Subject: WTB: Adhesives Textbooks
From: Peter@cygnetuk.demon.co.uk (Peter Swanson)
Date: Sun, 20 Oct 96 10:33:03 GMT
I would be grateful to get recommendations for text books on adhesives. I am
more interested in the practical, application side, rather than reams of
chemical formulae (I am not a chemist!).
TIA, Peter
--
...............................................................................
Peter Swanson Oxfordshire, England
peter@cygnetuk.demon.co.uk Compuserve: 100120,3641
http://ourworld.compuserve.com/homepages/Peter_Swanson
Confidence is the feeling you have before you understand the situation.
...............................................................................
Subject: are living PDMS able to initiate the oxiranes polymerization?
From: Thomas.Zundel@ping.be (ZUNDEL Thomas)
Date: 20 Oct 1996 16:00:29 GMT
It is known that, in order to prepare well-controlled block copolymers by
means of a sequential anionic polymerization technique, the order of
monomer addition is extremely crucial. That experimental situation
translates a nucleophilic scale, dependent on pKa, monomer reactivity,
and / or growing ends associations, leading to a cascade of decreasing
reactivity.
In that context, has anyone out there any informations, if metal
silanolates or living PDMS are able to initiate the oxiranes
polymerization ? (comments or references)
Thanks.
Subject: are living PDMS able to initiate the oxiranes polymerization?
From: Thomas.Zundel@ping.be (ZUNDEL Thomas)
Date: 20 Oct 1996 16:00:29 GMT
It is known that, in order to prepare well-controlled block copolymers by
means of a sequential anionic polymerization technique, the order of
monomer addition is extremely crucial. That experimental situation
translates a nucleophilic scale, dependent on pKa, monomer reactivity,
and / or growing ends associations, leading to a cascade of decreasing
reactivity.
In that context, has anyone out there any informations, if metal
silanolates or living PDMS are able to initiate the oxiranes
polymerization ? (comments or references)
Thanks.
Subject: Re: building a NIR spectroscope
From: wpenrose@interaccess.com (William R. Penrose)
Date: Sun, 20 Oct 1996 14:57:46
In article J M Woodgate writes:
>From: J M Woodgate
>Subject: Re: building a NIR spectroscope
>Date: Fri, 18 Oct 1996 22:40:20 +0100 (BST)
>In article , William R. Penrose
> wrote:
>>
>> In article <3265A2A2.41C6@jemcom.crs.uc.edu> Brent Viers
> wri
>> tes:
>> >Look up Oriel Corp's Web Page-they'l send you an informative set of
>> >catalogs with equipment like you describe.
>>
>> >> I'm interested in building a small NIR spectroscope with an infrared
>> >> diode laser and a photodiode. Would anyone have any suggestions
>> >> especially advice about building such a device and interpreting the
>> >> results? Please e-mail me any responses. Thanks in advance.
>>
>> You might find Oriel a tad pricey. Try calling American Science and Surplus
>> (Geneva, IL) or Edmund Scientific, and ask about front-surface diffraction
>> gratings. You'll need these to get very far into the NIR region.
>>
>> The kind of diode lasers you can buy only cover tiny regions of the NIR
>> spectrum. You can get about 4 different bands up to 4 microns with easily
>> available laser diodes. They can be temperature- or current-tuned across
>> about 60 nm, covering only a small part of the spectrum. Try infrared LED or
>> even a glowing source. A 1 watt ceramic resistor run at 5 - 10 watts worked
>> for me (but doesn't last too long).
>>
>> Bill
>>
> [sigsnip]
>Could one use an incandescent lamp run at lower than rated voltage? Glass
>must pass some IR but how far into the NIR?
>--
>Regards, John Woodgate Tel. +44 (0)1268 747839
> Fax +44 (0)1268 777124 OOO (Own Opinions Only)
********************************************************
Bill Penrose, Sr. Scientist, Transducer Research,
600 North Commons Dr., Suite 117
Aurora, IL 60504, 630-978-8802, fax: -8854
NOTE: NEW AREA CODE
email wpenrose@interaccess.com
********************************************************
Purveyors of contract R&D; and fine gas
sensors to this and nearby galaxies.
********************************************************
Subject: Re: building a NIR spectroscope
From: wpenrose@interaccess.com (William R. Penrose)
Date: Sun, 20 Oct 1996 15:03:40
In article J M Woodgate writes:
>Could one use an incandescent lamp run at lower than rated voltage? Glass
>must pass some IR but how far into the NIR?
An incandescent lamp will radiate through the NIR and well into the mid-IR.
You would run it at low voltage only to extend lamp life and improve
stability.
The cheap (well, under $2K) nondispersive IR carbon dioxide detectors use
ordinary flashlight bulbs as sources. (I've designed a product based on
this.) I'm not sure whether the 4.3 micron IR penetrates from the filament or
radiates from the glass surface. Because the time constant when the bulb is
turned on is only one second or so, it would seem that it's radiating from the
filament. I doubt if the glass envelope heats up anywhere near that quickly.
Bill
********************************************************
Bill Penrose, Sr. Scientist, Transducer Research,
600 North Commons Dr., Suite 117
Aurora, IL 60504, 630-978-8802, fax: -8854
NOTE: NEW AREA CODE
email wpenrose@interaccess.com
********************************************************
Purveyors of contract R&D; and fine gas
sensors to this and nearby galaxies.
********************************************************
Subject: Re: Looking for BOPP film suppliers
From: jaspevacek@mmm.com (John Spevacek)
Date: 21 Oct 1996 13:38:54 GMT
"Edmond Wong" wrote:
>Hi,
>
>I am looking for suppliers of BOPP film in Asia or USA, where can I find
>them? I found some names in Internet but the information is not very
>specific, like what type of products they are selling. Can anyone tell me
>where I can find more specific information. like directory or journal ?
>
Sorry, I don't know of any convenient spot that has what your looking
for. You might need to call all of the manufacturers individually. In the
USA, Mobil, and AET (Applied Extrusion Technologies) are the biggest, but
there is also Bemis, Borden, Courtalds, ICI, Simpro, Toray and UCB. I
think Simpro and Toray are in Asia as well.
John
Opinions expressed herein are my own and may not represent those of my employer.
Subject: Re: Cellulose Dissolution
From: Alberto Mariani
Date: Sun, 20 Oct 1996 16:43:09 +0200
On Sun, 20 Oct 1996, Alberto Mariani wrote:
> On 16 Oct 1996, kyoungjin kim wrote:
>
> > I am looking for some papers about " Cellulose Dissolution ".
> > If you not mind, could you mail me or posting it.
> > Thank you very much.
> >
> > E-mail : zeus@translab.chonnam.ac.kr
>
> Try some papers of Giuseppina Conio, Estella Bianchi etc.
>
> Bye
> Alberto
PS In any case, I THINK you can use dimetyl acetamide + 3-5 % LiCl
Subject: Available Research Assistanship in Composites Processing
From: rags@cc.umanitoba.ca (Raghavan Jayaraman)
Date: 21 Oct 1996 14:02:46 GMT
Research assistanship is available for a student who would like
to work towards a Ph.D. in Mechanical or Materials Engineering. The
assistanship will be in the range 14 to 15 K per year. The research is in
the area of polymer composites processing and is funded by NSERC and the
Industrial participants in Manitoba. Those with a BS or MS in Materials
Eng., Materials Science & Eng. or Mechanical Eng. are encouraged to
apply. Preference will be given to one who can start in Jan'97. If
interested, please contact
Prof. Raghavan Jayaraman
Junior NSERC Industrial Research Chair,
Dept. of Mechanical and Industrial Engineering,
348 D, Engineering,
15, Gilson Street, University of Manitoba,
Winnipeg, Manitoba, Canada R3T 5V6.
Tel.:- (204) - 474 - 7430
Fax.:- (204) - 275 - 7507.
E-mail :- rags @ cc.umanitoba.ca
Subject: job opening: computational chemistry/artificial intelligence
From: "Douglas A. Smith"
Date: Mon, 21 Oct 1996 11:22:50 -0400
This is a multi-part message in MIME format.
--------------27BC3BFE570E
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--
Dr. Douglas A. Smith, President and CEO |
voice: (814) 262-9091
The DASGroup, Inc. |
fax: (814) 262-9337
P.O. Box 5428 |
email: dsmith@dasgroup.com
Johnstown, PA 15904-5428 |
Contract R&D; specialists in computational
chemistry, process modeling, synthesis and design
of novel compounds for chemistry, materials
science, and biotechnology.
--------------27BC3BFE570E
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Content-Disposition: inline; filename="POSTDOCTORAL SCIENTIST .asc"
POSTDOCTORAL SCIENTIST
Come join The DASGroup, Inc., a rapidly growing contract research
and development company located in beautiful western
Pennsylvania. This new position will start 1 December 1996, or as
soon thereafter as a suitable candidate can be identified. In
order to qualify for this position, you must have a recent Ph.D.
in Chemistry (or a closely related field) with extensive
experience and publications in the design and application of
neural networks and artificial intelligence techniques for QSPR
of materials and/or QSAR of small molecules or biologically
active molecules. Programming ability in FORTRAN and C is
essential. Additional background, experience, and publications
with genetic algorithms and more traditional areas of
computational chemistry and molecular modeling are a plus.
The successful applicant will be expected to participate in a
number of on-going and future projects. S/he will interface with
other computational chemists and experimental scientists, and
will be expected to perform previously designed studies as well
as contribute creatively to new studies and projects.
In addition, this Postdoctoral Scientist will participate in the
development, writing, and overall preparation of proposals to
government and commercial clients. Excellent written and spoken
English are a must, as is experience with Microsoft Office
software. U.S. citizenship is not required but may be
advantageous for certain contract opportunities.
This position is for one year but may be extended or transitioned
to a full time permanent position based on performance and
company needs.
The Company
The DASGroup, Inc., is a small business founded in June 1992 as a
Technology Development and Transfer company with expertise
primarily in molecular modeling for the areas of organic and
biological chemistry, materials, and polymer science. During the
past four years, the company has been awarded three Phase I Small
Business Innovative Research (SBIR) contracts from the federal
government and one Phase II SBIR contract based on its molecular
modeling expertise. The company has also performed contracts with
the Army and various pharmaceutical, biotechnology, and computer
hardware and software companies. The company aggressively seeks
to expand its market presence in both government and commercial
contracting.
For more information regarding the technical aspects of this
position, please contact:
Dr. Douglas A. Smith, President and CEO
voice: (814) 262-9091
fax: (814) 262-9337
email: dsmith@dasgroup.com
To apply for this position, please send your curriculum vitae or
resume, and have at least two letters of recommendation forwarded
directly, to:
Ms. Sherry DiPaolo, Human Resources Coordinator
The DASGroup, Inc.
P. O. Box 5428
Johnstown, PA 15904-5428
voice: (814) 262-9091
fax: (814) 262-9337
email: sdipaolo@dasgroup.com
--------------27BC3BFE570E--
Subject: Re: FEA/Thermal Analysis of Blow Moldings
From: Peter Oehler
Date: 21 Oct 1996 13:37:51 -0700
In article , ssmyers102@aol.com says...
>
>
> Does anyone have a ggod source for thermal analysis of Blow Molded
>articles, I have only seen this work done for injection molds.
>
> Thanks
>
> Scott
Scott,
you might want to try contacting C-Mold (formerly AC Technologies) in Ithica NY (sorry, no number handy)
They are one of the leading suppliers of mold filling analysis software and have recently
released a blowmolding and a thermoforming simulation package based on work done
at GE's Corporate Research and Development Center. I have had great success using this
software in a previous life (recently changed jobs). They can send you information on the
code, and probably point you to some consultants if you need an analysis done. I believe
they also do some analysis of their own.
Good Luck,
Peter Oehler
In Focus Systems
Subject: Re: QC? QA? TQM? ISO? Please Explain!!!
From: "Stephen Taylor"
Date: 22 Oct 1996 08:37:06 GMT
- wrote in article
<5462cq$lpv@sjx-ixn2.ix.netcom.com>...
> Dear Friends of the Science Community,
>
> I thought I had all the acronyms delineated and understood until the
> recent conversations with experts in their respective fields thoroughly
> confused me. I would like to know the standard interpretations of what
> these terms mean to you. Your input is much appreciated.
>
> quality control vs. quality assurance
> total quality management vs. re-engineering
> iso-certifications
>
> Regards,
>
> May
>
> P.S. Not too long ago, I had a chance conversation with a customer
> service representative from an LC supplies company (whose name I would
> like to remain anonymous) regarding a defective part I had ordered.
> Her immediate response to my claim of the product's defects was "How
> can it be? We are Iso-9000 certified."
>
I'll say from the start that ISO9000 cetrifcation is definately not a
guarentee that
a product will not be defective.
QA - quality assurance involves the implementation of a system to
minimise the
risk that a product will be defective.(i.e maintaining tracability,
careful
proccess controls etc..)
QC- quality control involves final testing of the product to ensure that it
complies with customer specifications.
ISO9000/9001- is a cerification programm meant to ensure that a company
has a suitable quality assurance / quality control programm in place as
well as methods to ensure problems are delt with quickly and the source
of the problem amended.
It is quite possible for a ISO9000 company to send out a faulty product,
what ISO9000 should mean though is that fewer faulty goods are produced and
prompt corrective methods are undertaken.
ISO9000 should not be an excuse for poor quality rather a useful tool for
both customer and supplier to eliminate problems with goods ans services.
hope you find this helpful
Stephen T
Subject: Re: materials & recipe??
From: "Peter Hammond"
Date: 22 Oct 1996 09:29:46 GMT
Antoni S. Gozdz wrote in article
<53p6sl$e83@athos.cc.bellcore.com>...
> In article Linda Cudmore
writes:
> >Hi,
> >
> > I am not a science person and have no experience in the field of
> >materials, what I do do is rock climb. What I wanted to do was make
> >climbing holds, but I have no idea how to make them and were to get the
> >materials. I have checked out the climbing groups, but they generally
> >haven't given me any help.
> I'd say--_absolutely don't try it_--unless you've had enough of this
world
> or the rocks are 10 ft high. BTW, I thought climbers have a bit more of
> a self-preservation instinct.
>
> Tony Gozdz
> tony2@bellcore.com
Hi.
Synthetic holds for home made climbing walls are perfectly OK if made and
fitted properly. In fact,
I made a traversing wall around my house by glueing stones out of the
garden onto the bricks using Plastic Padding (a polyester based filler). A
good epoxy would probably have been better, but it was perfectly OK. As I
said, it was a traversing wall, so it would not have been too bad if one
had failed.
If you want to make specially shaped holds, try plaster of paris. It can be
moulded in a plastic bag, as it sets in a couple of minutes so you just
hold it in the shape you want. I'm not sure about its water resistance. A
harder wearing alternative would be cement, probably 1:2 with sand would be
hard enough. If you want to make moulds, room temperature curing silicone
is excellent. I'm not sure about its availability in the "domestic" market,
but a commercial supplier should be able to do about a gallon over the
counter.
Hope this helps,
Pete.
Subject: Toxicity
From: scharringhausen
Date: Tue, 22 Oct 1996 12:06:53 -0700
Although maybe no one in this group can help me directly, perhaps someone
can give me a hint, where I can get the information I'm looking for.
I'm searching for the mechanism of cell death / membrane dammage as a
result of polymer-cell interaction. The polymer I'm reffering to is a
poly cationic polymer.
Thank you, Tessa Scharringhausen
--
Leiden Institute of Chemistry, Gorlaeus Laboratories.
Leiden University;Einsteinweg 55 / P.O. Box 9502 2300RA, Leiden The
Netherlands.
Phone: +31 71 5274400 TeleFax: +31 71 5274537
Department: Phone: +31 71 527
Subject: Re: Scratching Perspex (PMMA)
From: milty@umich.edu (David C. Martin)
Date: Tue, 22 Oct 1996 05:10:26 -0400
For a general method of investigating the scratch resistance of polymers
and polymer composites see:
R. S. Kody and D. C. Martin, Polymer Engineering and Science, 36(2),
298, (1996).
and references therein.
--
David C. Martin
Associate Professor of Materials Science and Engineering and
Macromolecular Science and Engineering
2022 H. H. Dow Building
Ann Arbor, MI 48109-2136
(313) 936-3161
(313) 763-4788 FAX
milty@umich.edu
http://www-personal.engin.umich.edu/~milty/
Subject: Re: Scratching Perspex (PMMA)
From: milty@umich.edu (David C. Martin)
Date: Tue, 22 Oct 1996 05:10:26 -0400
For a general method of investigating the scratch resistance of polymers
and polymer composites see:
R. S. Kody and D. C. Martin, Polymer Engineering and Science, 36(2),
298, (1996).
and references therein.
--
David C. Martin
Associate Professor of Materials Science and Engineering and
Macromolecular Science and Engineering
2022 H. H. Dow Building
Ann Arbor, MI 48109-2136
(313) 936-3161
(313) 763-4788 FAX
milty@umich.edu
http://www-personal.engin.umich.edu/~milty/
Subject: Re: materials & recipe??
From: akarpowicz@mta.ca (Adam Karpowicz)
Date: Tue, 22 Oct 1996 09:12:34
In article <01bbbffb$588c3220$6e2349c2@petes-pc> "Peter Hammond" writes:
>From: "Peter Hammond"
>Subject: Re: materials & recipe??
>Date: 22 Oct 1996 09:29:46 GMT
>Antoni S. Gozdz wrote in article
><53p6sl$e83@athos.cc.bellcore.com>...
>> In article Linda Cudmore
> writes:
>> >Hi,
>> >
>> > I am not a science person and have no experience in the field of
>> >materials, what I do do is rock climb. What I wanted to do was make
>> >climbing holds, but I have no idea how to make them and were to get the
>> >materials. I have checked out the climbing groups, but they generally
>> >haven't given me any help.
>> I'd say--_absolutely don't try it_--unless you've had enough of this
>world
>> or the rocks are 10 ft high. BTW, I thought climbers have a bit more of
>> a self-preservation instinct.
>>
>> Tony Gozdz
>> tony2@bellcore.com
>Hi.
>Synthetic holds for home made climbing walls are perfectly OK if made and
>fitted properly. In fact,
>I made a traversing wall around my house by glueing stones out of the
>garden onto the bricks using Plastic Padding (a polyester based filler). A
>good epoxy would probably have been better, but it was perfectly OK. As I
>said, it was a traversing wall, so it would not have been too bad if one
>had failed.
>If you want to make specially shaped holds, try plaster of paris. It can be
>moulded in a plastic bag, as it sets in a couple of minutes so you just
>hold it in the shape you want. I'm not sure about its water resistance. A
>harder wearing alternative would be cement, probably 1:2 with sand would be
>hard enough. If you want to make moulds, room temperature curing silicone
>is excellent. I'm not sure about its availability in the "domestic" market,
>but a commercial supplier should be able to do about a gallon over the
>counter.
>Hope this helps,
>Pete.
I find it hard to believe someone can recommend materials as brittle as
plaster of Paris and concrete for this application. The holds must not only
resits the pressure of shoes/boots/hands, but also be bolted to a climbing
structure. I suppose a epoxy/chopped fiberglass could be tried.
Adam
Subject: Working With Styrene Monomer?
From: gwhite@ll.mit.edu (Doug White)
Date: Tue, 22 Oct 96 17:47:20 GMT
I'm a microwave circuit designer looking into making dielectric
materials by loading polystyrene with a filler. Pure polystyrene has
the best electrical properties at microwave frequencies for this, but
not being a polymer chemist, I've got a few questions.
I can buy styrene monomer from a couple of sources, but it has 10-15ppm
of p-tert-Butylcatechol as a stabilizer. I have a paper on styrene
dielectrics that recommends a mix of 100 parts Styrene monomer, 6 parts
Divinyl benzine and 1 part Benzoyl peroxide. My assumption is that the
peroxide is the catalyst, but I'm not sure what the Divinyl benzine is
doing. It may be there to stabilize the monomer, aid in machinability
or something else. The paper says that purity is important, and that
'removal of polymerization inhibitor from monomers is helpful, but not
mandatory'. They don't really go into much detail on this. I can get
99.5% 'PA' grade monomer.
Fortunately, I will be working with fairly small samples, so heat build
up shouldn't be too bad (I hope).
Anyway, I was wondering:
1) Is there a purer grade than 'PA' that is readily available? Does
anyone know if it matters that much?
2) Am I likely to have much excitement when I mix this stuff together?
Is there a prefered way to mix the materials, like adding acid to water?
3) Are there other options for stabilizers, or is this stuff pretty
standard? I know that unstabilized monomer can be spectacular if a
large batch decides to seize up on you. Fisher didn't have a shelf life
spec on their stuff, but I assume they put enough stabilizer in it to
keep it around for a few years. If I could get something that was good
for a few months, that might be better.
4) Are their other sources I should look into? Acros has the PA grade
for $54/liter, which sounds perfectly reasonable.
5) Anything else I should know about this stuff?
Thanks!
Doug White
MIT Lincoln Laboratory