Newsgroup sci.polymers 8489

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What temp. does the processing of the aluminum foil get up to. It's
pretty well established that silicone degrades via cyclization at
elevated temps-certain conditions (e.g. presence of Pt, hydroxyl
endgroups) tend to facilitate this degradation. 
	Prob. the best expert in the field of silicone degradation/cyclics is
Professor Stephen Clarson-a dean of engineering here at the University
of Cincinnati. try to get a hold of him.
Roger W. Faulkner wrote:
> 
> I've just taken a job in R&D; on condoms. It appears that there is a
> degradation reaction in foil-wrapped (i.e., anaerobic) packages that
> leads to the formation of cyclic trimer & tetramer, which damage
> physical properties.
> 
> Does this seem reasonable? Does anyone have specifics and/or ideas as to
> how I can inhibit or prevent this reaction? Please copy to email, as I'm
> going to be moving for the next week....Roger Faulkner
-- 
Brent D. Viers                 
Department of Chemistry         
Polymer Research Center         
Mail Location 0172              
University of Cincinnati        
Cincinnati, OH 45221-0172       
Telephones: 513-556-9291        
            513-556-9290        
Fax: 513-556-9239                
e-mail:viersbd@ucbeh.san.uc.edu

Hello, I'm looking for a system based on epoxy resin, which could cure
quickly (less than 30 min) at room temperature, in bulk (without solvent).
The usual system Epoxy/diamine cures to slowly. If anyone know a standard
system which looks like what I need, please e-mail me.
liang@club-internet.fr

In article <327D6CC3.5E0D@cris.com>, Ralph &/or Donna  wrote:
> Eyal Adler wrote:
> > 
> > Who are the big polymers emulsion manufactutrers besides Elf, BASF, Rohm
> > and HAASS?
> > 
> > I am looking for a company that willbe able to compete in the comodities
> > grades.
> > 
> > Thanks in advance for the help.
> > 
> > Eyal Alder 
> 
> You might want to check out Dow Chemical Company - They annually sell
> over a billion pounds of emulsion polymers (solids basis):
> 
> http://www.dow.com/emulpoly/index.html
> 
> czere@cris.com
Union Carbide's UCAR Emulsions Systems group in Cary, NC is also a
significant player in the latex emulsion business on a worldwide basis. 
Full disclosure:  I am a Union Carbide employee who works in another
business area.
Bob Weinheimer
-- 
Bob Weinheimer
Charleston, West Virginia
rmw@citynet.net

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Tim Heisel  wrote:
>Polyethylene containers are surface treated with fluorine gas to improve
>their solvent barrier properties.  I am looking for a quantitative test
>to determine the extent of conversion of C-H bonds to C-F bonds.  FTIR
>may have some potential.  Any suggestions would be welcome.
ESCA a.k.a., XPS.
John

Eyal Adler  wrote:
>Does anyone know who manufactures ZnO (Zinc Oxide) that can be used as a
>cross linking agent? If I am not mistaken, it comes as a suspension.
Aldrich sells a variety of grades, upto 99.999%.
John

This is a multi-part message in MIME format.
--------------68D45183BA7
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-- 
Avec les meilleurs sentiments du laboratoire Chop,
      Universite catholique de Louvain-CICO-Chop
       1, place Pasteur, 1348-Louvain la Neuve (Wallonie-Belgique)
           tel: 32-10-472713/  fax: 32-10-473074
--------------68D45183BA7
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Content-Transfer-Encoding: 7bit
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Notes:- This message is being sent to multiple lists; pardon me if you receive it more than once.
      - We attach the greatest value to Exhibit and Sponsorship opportunities.
ESOR-VI
-------
6th European Symposium on Organic reactivity
http://www.chim.ucl.ac.be/CHIM/ESOR.html
 (!case sensitive)
Louvain-la-Neuve      24 - 29 July 1997
_______________________________________First Circular
The Catholic University of Louvain, located in the Belgian city of Louvain-la-Neuve, will host the next conference entitled "European 
Symposium on Organic Reactivity". This will be the sixth edition of a series of successful meetings held in Paris (1987), Padova (1989), 
Göteborg (1991), Newcastle-upon-Tyne (1993) and  Santiago de Compostela  (1995).
Location
________
Louvain-la-Neuve is located about 30 km south of Brussels in the french-speaking part of Belgium. The city is connected with Brussels 
by rail and is readily accessible by road (Motorway E411) from everywhere in Europe. Brussels National Airport is linked to all major 
and most medium-size European cities.  
The Conference site will be part of the academic facilities of the Catholic University of Louvain (U.C.L.). This University was founded in the old Belgian city 
of Leuven in 1425 as one of the oldest universities in Europe. In the early 1970's, the french-speaking part of the University moved to a completely new city which 
was called Louvain-la-Neuve, on the territory of a town named Ottignies. The University population amounts to more than 20,000 students.  Courses are 
organized in all disciplines of human knowledge by ten Faculties : Theology, Philosophy, Law, Economic and Social Sciences, Philology and Arts, Psychology 
and Educational Sciences, Sciences, Applied Sciences, Medicine and Agronomy. 
Scientific Programme
____________________
The meeting will be devoted to all aspects of physical organic chemistry.
The conference programme will focus on three main topics :
1. 	Mechanisms and reactivity in organic, bioorganic and organometallic chemistry, including theoretical approaches
2.	Photochemical and electron transfer activation processes
3. 	Molecular recognition and enzyme mechanism.
The programme will include 12 plenary lectures, two parallel sessions with their own invited lectures. A limited number of oral 
presentations will be selected among the submitted contributions. 
Two separate poster sessions are planned on Friday afternoon and Monday afternoon with comfortable discussion times. Persons 
wishing to present an oral or poster contribution should submit a one-page abstract according to the format detailed below not later 
than  February 15, 1997 and send it to
	Prof. M. Devillers
	ESOR-VI /Conference Secretary
	Catholic University of Louvain(U.C.L.)
	Laboratory of Inorganic and Analytical Chemistry
	1 place Louis Pasteur
	B-1348 Louvain la Neuve , Belgium
	Tel. : 32-10 47 28 27
	Fax :  32-10 47 28 36
	e-mail : devillers@inan.ucl.ac.be
Plenary lectures
________________
Twelve recognized experts have already agreed to give Plenary Lectures on the following topics :
V. Balzani,University of Bologna, Italy,
	Supramolecular photochemistry.
S.J. Benkovic,The Pennsylvania State University, USA,
	Perspective on biocatalysis.
F. Diederich,Swiss Federal Institute of Technology, Zurich,
	From supramolecular chemistry to medicinal chemistry.
J.B. Engberts,University of Groningen, The Netherlands,
	Vesicles formed from synthetic amphiphiles. 
	Fusogenic behavior and applications as drug carrier systems.
J. Fréchet,Cornell University, USA,
	Designing for novel macromolecular architectures:from concept to applications.
B.Giese,University of Basel, Switzerland,
	Reactivity of DNA radicals.
Y. Kishi,Harvard University, USA,
	Synthetic studies in the field of natural product chemistry.
H. Mayr,Technische Hochschule Darmstadt, Germany,
	Linear free enthalpy relationship : a powerful tool for	the design of organic or organometallic syntheses.
R. Noyori,Nagoya University, Japan,
	Asymmetric hydrogenation : mechanistic aspects.
M. Poliakoff,University of Nottingham, U.K.,
	Intermediates in organometallic chemistry.
P. von Rague Schleyer,University of Erlangen-Nürnberg, Germany,
	Organic reactivity and computational chemistry.
I. Willner,The Hebrew University of Jerusalem, Israel,
	Electroenzymes, photoenzymes and command surfaces - Tailored assemblies for optobioelectronic 
	devices.
Abstracts
_________
Full one-page abstracts will be reproduced directly from authors'original documents. They should be typed or printed in English using 
double line spacing on A4 formatted white paper. The whole of the abstract must be contained within a rectangle of size 242 x 165 mm. 
It will be reduced to 79 %. The headings should be presented in the format given below, including the full line separating text and 
heading.
References should be indicated within square brackets in the text and listed at the bottom of the abstract using standard Chemical 
Abstracts Source Service Index terminology followed by volume,(year within brackets) , first page.
Example:
DECOMPOSITION OF NITROSOUREAS IN THE PRESENCE OF DIFFERENT NUCLEOPHILES
S. Amado*, A. Andrade, L. Garcia-Rio, J.R. Leis and A.M. Rios,
Departamento de Quimica Fisica, Facultad de Quimica, Universidad de Santiago,
 15706 Santiago de Compostela, Spain.
	The reactivity of different nucleophiles toward the ambident electrophile N-nitroso-N,N'-dimethylurea (NDMU) has been 
investigated. The experimental results...
The Book of Abstracts including all lectures and oral or poster contributions will be handed out to all registered participants upon 
arrival.
Social Events
_____________
The provisional social programme for Conference participants includes the following events :
Thursday :		Welcome drink and get-together sandwich buffet at lunchtime
Thursday evening :	Concert
Friday evening :	Belgian Cheese and Beer party at the end of the	poster session
Sunday afternoon :	Excursion
Monday evening :	Conference Dinner
An Accompanying Persons' Programme will be arranged for the whole conference period. Further details will be included in the 
Second Circular.
Registration fees 
_________________
-Normal pre-registration fee before March 31, 1997	BEF 10 000
  Registration fee after March 31, 1997	                BEF 12 500
-Students      before March 31, 1997                    BEF  5 000
	       after March 31, 1997             	BEF  6 000	
-Participants from Industry
	before March 31, 1997                   	BEF 15 000
	after March 31, 1997	                        BEF 18 000
-Accompanying Persons                           	BEF  2 000
Organizing Committees
_____________________
Local Organizing committee
--------------------------
Chairmen :Prof. J. Fastrez and Prof. L. Ghosez (U.C.L., Louvain-la-Neuve)
Conference Secretary :Prof. M. Devillers (U.C.L., Louvain-la-Neuve)
Members : 
Dr.   O. B Nagy (U.C.L., Louvain-la-Neuve)
Prof. P. De Clercq (R.U.G., Gent)
Prof. F. De Schrijver (K.U.L., Leuven)
Prof. L. Hevesi, (F.U.N.D.P., Namur)
Prof. F. Kirsch-Demesmaeker (U.L.B., Brussels)
Prof. A. Laschewsky (U.C.L., Louvain-la-Neuve)
Prof. J. Marchand-Brynaert (U.C.L., Louvain-la-Neuve)
Prof. J.-P. Soumillion (U.C.L., Louvain-la-Neuve)
International Advisory Committee
--------------------------------
Prof. P. Ahlberg (Chairman, Göteborg, Sweden)
Dr.   M. Eckert-Maksic (Zagreb, Croatia)
Prof. J. Engberts (Groningen, Netherlands)
Dr.   R. Leis (Santiago de Compostela, Spain)
Dr.   H. Maskill (Newcastle-upon-Tyne, England)
Prof. R. More O'Ferrall (Dublin, Ireland)
Prof. P. Müller (Genève, Switzerland)
Prof. M. Page (Huddersfield, England)
Prof. Z. Rappoport (Jerusalem, Israel)
Prof. M.-F. Ruasse (Paris, France)
Prof. G. Scorrano (Padova, Italy)
Prof. U. Siehl (Ulm, Germany)
For further information, please refer to the Scientific Secretariat of the Conference :
	Prof. M. Devillers
	ESOR-VI Conference Secretary
	Catholic University of Louvain
	Laboratory of Inorganic and Analytical Chemistry
	1 place Louis Pasteur
	B-1348 Louvain la Neuve , Belgium
	Tel. : 32-10 47 28 27
	Fax :  32-10 47 28 36
	e-mail : devillers@inan.ucl.ac.be
or get a moment to see our page maintained by Claude Drossart at:
    http://www.chim.ucl.ac.be/CHIM/ESOR.html
To receive the Second Circular/Application Form for this Symposium (January 1997), please print and fill in the following form, send it to 
the Conference Secretary ( or an Email with the same information).
DO NOT SEND YOUR REPLY TO THE LIST !
_______________________________________________________________
Title :  Prof. -  Dr.  -  Mr.  -  Mrs.  (circle when applicable)
Name : 
____________________________________________________________
First Name : 
____________________________________________________________
Institution : 
____________________________________________________________
Address : 
____________________________________________________________
____________________________________________________________
____________________________________________________________
____________________________________________________________
tel:_________________   fax:_____________________
e-mail:__________________________________________
I intend to present a short contribution
	preferably as oral presentation			 
	preferably as a poster				 
I have no preference between oral and poster presentation				 
--------------68D45183BA7--

In sci.polymers, liang@club-internet.fr (Liang Yi) writes:
>Hello, I'm looking for a system based on epoxy resin, which could cure
>quickly (less than 30 min) at room temperature, in bulk (without solvent).
>The usual system Epoxy/diamine cures to slowly. If anyone know a standard
>system which looks like what I need, please e-mail me.
>
>liang@club-internet.fr
Liang:
I shouldn't answer your question without knowing what you're doing,
but a standard bisphenol A epoxy, like Shell EPON 828, Dow DER 332,
or Ciba Geigy Araldite GY 6010 cured with DETA or TETA is about the
best you can do.  It will not "cure" in 30 minutes, but it will set
up in about that time.  If this is not fast enough, you will need to
use an aliphatic epoxy.
Tom

I am hoping that someone can give me some insight into the chemical
nature of the ordinary transparency films used in laser printers
and/or photocopiers.
Specifically I would like to know what kind of polymers these might
be?
We used to call these "acetates" 
(1)   Are they really celulosics?  and if so, are they cellulose
acetate?
(2)  Could there be other chemical coatings on them?
(3) Could the different types available at the local office supply be
different in chemical makeup?
(4) Who is extruding films for this type of application?
I am investigating the possibility of laminating these films to other
plastic materials.
Any comments are greatly appreciated.
Fred Adler 
Allstar Plastics
Our web site is located at:
http://www.allstarco.com/
Voice: 514-337-0524
Fax: 514-337-6895
Email: allstar@autoroute.net

                    International Conference on
            Engineering Applications of Neural Networks
                             EANN '97
                        Stockholm, Sweden
                         16-18 June 1997
                      Second Call for Papers
The conference is a forum for presenting the latest results on neural
network applications in technical fields. The applications may be in
any engineering or technical field, including but not limited to
systems engineering, mechanical engineering, robotics, process
engineering, metallurgy, pulp and paper technology, aeronautical
engineering, computer science, machine vision, chemistry, chemical
engineering, physics, electrical engineering, electronics, civil
engineering, geophysical sciences, biotechnology, and environmental
engineering.
Abstracts of one page (about 400 words) should be sent to
eann97@kth.se by 21 December 1996 by e-mail in plain ASCII
format. Please mention two to four keywords, and whether you prefer
it to be a short paper or a full paper. The short papers will be 4
pages in length, and full papers may be upto 8 pages. Notification of
acceptance will be sent around 15 January. Submissions will be
reviewed and the number of full papers will be very limited. For
information on earlier EANN conferences see the www pages at
http://www.abo.fi/~abulsari/EANN95.html and
http://www.abo.fi/~abulsari/EANN96.html
Organising of a few special tracks has been confirmed so far: 
Computer Vision (J. Heikkonen, Jukka.Heikkonen@jrc.it), 
Control Systems (E. Tulunay, Ersin-Tulunay@metu.edu.tr),
Hybrid Systems (D. Tsaptsinos, D.Tsaptsinos@kingston.ac.uk),
Mechanical Engineering (A. Scherer, Andreas.Scherer@fernuni-hagen.de),
Biomedical Systems (G. Dorffner, georg@ai.univie.ac.at),
Process Engineering (R. Baratti, baratti@ndchem3.unica.it).
Authors are encouraged to send the abstracts to the organisers of the
special tracks, instead of eann97@kth.se, if your paper is relevant to
one of the topics mentioned above.
Advisory board
J. Hopfield (USA) & A. Lansner (Sweden) & G. Sjödin (Sweden) 
Organising committee
A. Bulsari (Finland) & H. Liljenström (Sweden) & D. Tsaptsinos (UK)
International program committee (to be confirmed, extended)
G. Baier (Germany)	R. Baratti (Italy)	S. Cho (Korea) 
T. Clarkson (UK) 	G. Dorffner (Austria) 	W. Duch (Poland) 
A. Gorni (Brazil) 	J. Heikkonen (Italy) 	F. Norlund (Sweden) 
A. Ruano (Portugal) 	C. Schizas (Cyprus) 	J. Thibault (Canada) 
E. Tulunay (Turkey) 	J. McDemott (USA) 	
Electronic mail is not absolutely reliable, so if you have not heard
from the conference secretariat after sending your abstract, please
contact again. You should receive an abstract number in a couple of
days after the submission.

                    International Conference on
            Engineering Applications of Neural Networks
                             EANN '97
                        Stockholm, Sweden
                         16-18 June 1997
                      Second Call for Papers
The conference is a forum for presenting the latest results on neural
network applications in technical fields. The applications may be in
any engineering or technical field, including but not limited to
systems engineering, mechanical engineering, robotics, process
engineering, metallurgy, pulp and paper technology, aeronautical
engineering, computer science, machine vision, chemistry, chemical
engineering, physics, electrical engineering, electronics, civil
engineering, geophysical sciences, biotechnology, and environmental
engineering.
Abstracts of one page (about 400 words) should be sent to
eann97@kth.se by 21 December 1996 by e-mail in plain ASCII
format. Please mention two to four keywords, and whether you prefer
it to be a short paper or a full paper. The short papers will be 4
pages in length, and full papers may be upto 8 pages. Notification of
acceptance will be sent around 15 January. Submissions will be
reviewed and the number of full papers will be very limited. For
information on earlier EANN conferences see the www pages at
http://www.abo.fi/~abulsari/EANN95.html and
http://www.abo.fi/~abulsari/EANN96.html
Organising of a few special tracks has been confirmed so far: 
Computer Vision (J. Heikkonen, Jukka.Heikkonen@jrc.it), 
Control Systems (E. Tulunay, Ersin-Tulunay@metu.edu.tr),
Hybrid Systems (D. Tsaptsinos, D.Tsaptsinos@kingston.ac.uk),
Mechanical Engineering (A. Scherer, Andreas.Scherer@fernuni-hagen.de),
Biomedical Systems (G. Dorffner, georg@ai.univie.ac.at),
Process Engineering (R. Baratti, baratti@ndchem3.unica.it).
Authors are encouraged to send the abstracts to the organisers of the
special tracks, instead of eann97@kth.se, if your paper is relevant to
one of the topics mentioned above.
Advisory board
J. Hopfield (USA) & A. Lansner (Sweden) & G. Sjödin (Sweden) 
Organising committee
A. Bulsari (Finland) & H. Liljenström (Sweden) & D. Tsaptsinos (UK)
International program committee (to be confirmed, extended)
G. Baier (Germany)	R. Baratti (Italy)	S. Cho (Korea) 
T. Clarkson (UK) 	G. Dorffner (Austria) 	W. Duch (Poland) 
A. Gorni (Brazil) 	J. Heikkonen (Italy) 	F. Norlund (Sweden) 
A. Ruano (Portugal) 	C. Schizas (Cyprus) 	J. Thibault (Canada) 
E. Tulunay (Turkey) 	J. McDemott (USA) 	
Electronic mail is not absolutely reliable, so if you have not heard
from the conference secretariat after sending your abstract, please
contact again. You should receive an abstract number in a couple of
days after the submission.

In article ,
   Wayne Goates  wrote:
>I have a T-shirt that will change color from a more or less drab gray 
>color to that of a blue and a yellow when exposed to the UV light of the 
>sun.  Does anyone know what company markets this Thermochromatic product 
>and if so, what is their address?  Thanks in advance. 
>
>----------
>Wayne Goates   Email:goat5200@spacelink.msfc.nasa.gov
>
>
One supplier of thermochomic pigments is James Robinson Ltd.(UK)
The trade name is "Reversacol" and the US agent is Keystone 
Aniline Corp.
Keystone's website can be found at http://www.dyes.com
Regards - CD
****************************
     Christopher Dobbin
       Colortech Inc.
 http://www.colortech.on.ca
****************************

Just wondering if anyone might have some rate constants for phenol
formaldehyde polymerization.

In article <326FB651.2781@jemcom.crs.uc.edu> Brent Viers  writes:
>From: Brent Viers 
>Subject: Re: BIOCIDAL AQUEOUS POLYMERS
>Date: Thu, 24 Oct 1996 14:32:50 -0400
>I know of a NON-aqueous material, which might be better for your
>purpses. Its a silicone(quarternary amine) manuf. by Dow Corning (I
>think-I'm not sure of the trade name). This is the material used in the
>odor fighting socks (Burlington Biogaurd) -this polymer resists
>laundering and thus is reusable. Thus, you might be able to make a
>suspension with our material, and then filter oput the polymer and the
>bugs.
>I hope that this helps. ;)
>Brent 
>bedue wrote:
>> 
>> Hi everybody,
>> 
>> Anyone could tell me if biocidal aqueous polymers exist (for example with
>> quarternary ammonium pendant groups) or are commercialized?
>> I heard about a product named KATAPOL?
>> Thanks
>-- 
>Brent D. Viers                 
>Department of Chemistry         
>Polymer Research Center         
>Mail Location 0172              
>University of Cincinnati        
>Cincinnati, OH 45221-0172       
>Telephones: 513-556-9291        
>            513-556-9290        
>Fax: 513-556-9239                
>e-mail:viersbd@ucbeh.san.uc.edu
Chitosan (biopolymer extracted from crustacean exoskeleton, squid or 
mushrooms) is soluble in aqueous solution and is an antimicrobial.   There are 
a few others but so far this is the best.
Regards
Rachel

Dear Netters:  
I'm looking for the density of polybutadiene and poly(dimethylbutadiene) 
in order to calculate self-diffusion coefficient of small gases in that 
polymer by molecular dynamics. Although I searched polymer handbook, I 
could not see the details of experiments, for example, pressure or 
solvent system. It'll be better if there are latest experiments or 
calculations for that polymers. I'll appreciate that you comment about 
this work.  
Thanks in advance, 
Ho Young Jeong
-----------------------------------------------------------------
 //'''\\    Ho Young Jeong        jeonghy@camd1.kkpcr.re.kr
 q ^ ^ p    Kumho Chemical Laboratories   (T)82-42-865-8625
 ( ___ )    P.O.Box 64, Yuseong, Taejon 305-600, S. Korea ! 
-----------------------------------------------------------------

I am looking for suspension method to make AES resin.
Because EPDM is not dissolved in Styrene and Acrilonitrile monomer
solution, I'm holding my research.
If you know suspension method for AES resin, please give me a hint or
reference journal name or patant number.
Your comments and suggestions will be extremely important to me.
Thank you.
Kang-Ro Yoon.