Subject: Re: Water Soluble Resin
From: "Lori A. Vratsanos"
Date: Thu, 19 Dec 1996 09:15:34 -0500
John Spevacek wrote:
>
> "Jeff" wrote:
> >I am looking for a water soluble resin. The solid resin must be
> >transparent. Can anyone help me?
> Rule out the crystalline compounds (Poly vinyl alcohol, polyethylene
> oxide, polyethylene imine.) The crystallinity will cause cloudiness in
> the solid.
>
> That leaves poly acrylic acid, polyacrylamide, poly vinylpyrrolidone, and
> polyvinyl methyl ether. There are also numerous esters of the acrylic
> based polymers plus the corresponding salts, plus thousands of other that
> have been synthesized in labs but are not available in commercial
> quantities.
>
> --
> A desk is a terrible spot to view the world from.
>
> Opinions expressed herein are my own and may not represent those of my employer.
I must chime in here...polyvinyl alcohol makes beautiful clear films!
What thickness are you looking for in the solid?
Lori opinions are my own, not my employer's
vratsala@apci.com
Subject: Re: Composite fibers?
From: dmond@ibm.net (dmond)
Date: Thu, 19 Dec 1996 16:37:04 GMT
Paul wrote:
>I am looking for some kind of synthetic filament that isn't much thicker
>than a spider web, but is really really strong. I have heard about
>Kevlar, but I understand that there are fibers even stronger. I have a
>plethora of questions:
>
>What else is stronger, or nearly as strong as Kevlar?
>Are there different thicknesses of the single fibers or do they just
>change the number of strands?
>Where can I get samples of some of these materials?
>Where can I find comparance tables, or technical info?
>Can I get a spool of single fiber? or does it only come in multiple
>strands?
>What are the pro's and con's of the different fibers?
>
>
Two fibers I can recommend in addition to Kevlar (DuPont) are PBI and
high strength polyethylene. Allied Signal Fibers makes Spectra fibers
(high strength polyethylene) which show improved strength versus
Kevlar and are used in antiballistic garmentware. PBI fibers also
show very high tenacities. You might want to contact Hoechst Celanese
Corporation (produce PBI) and Amoco Fibers (Amodel fibers) to see if
their yarns meet your requirements. There are a couple of new
polymers under development that might have even better properties, but
they are not available at this time and I am not able to comment on
their chemistry.
Subject: Plastics in Automotive Engeneering
From: Karl Donauer
Date: Thu, 19 Dec 1996 17:25:51 -0800
Hello everybody,
i need informations about the use of plastics in car - body - panels,
maybee in new car - projects like the BMW just 4/2,
Daimler Benz A - Klasse, or MCC - Swatch - Car.
Further information about the molding - prozesses is also interesting.
Thank you
K. Donauer, Student in Plastics Technology (Wuerzburg)
k6158.@mail.fh-wuerzburg.de
Subject: Graduate assistantship available
From: rick@omni.cc.purdue.edu (Rick Millane)
Date: 19 Dec 1996 12:13:03 -0800
GRADUATE ASSISTANTSHIP:
COMPUTATIONAL POLYMER PHYSICS
Purdue University
Whistler Center for Carbohydrate Research and
Computational Science and Engineering Program
West Lafayette, IN 47907-1160
Attention: Dr. R.P. Millane
Graduate assistantship available for study towards the Ph.D.
degree in Purdue's Graduate Program in Computational Science and
Engineering. This position would suit someone interested in applying
a sound background in theoretical/computational physics or
engineering to simulation of the conformations, interactions,
and higher-level structure development of industrially important
water-soluble biopolymers. The research project will involve
theory and computational algorithms for polymer modeling
(conformational analysis, statistical mechanics, Monte Carlo
simulation, network formation). Applicants should
have a B.S. or, preferably, an M.S. degree, and have superior
GPA and GRE scores. Interested individuals should contact
Dr. R.P. Millane at rmillane@purdue.edu.
Purdue University is an AA/EO employer.
Subject: Re: Santoprene
From: haans@endura.com (Haans Petruschke)
Date: Thu, 19 Dec 96 08:47:23 GMT
>Can anyone please tell me anything about Santoprene ?
>What I only know about it is it is a blend of rubber and PP.
>Thank you.
Santoprene is a themoplastic vulcanate. A form of themoplastic rubber. It
is indeed a blend of rubber and PP, but its elastomeric domains are more
finely distributed than in TPO. This is because the rubber is vulcanized
during the blending process.
For more information about Santoprene, contact the manufacturer, Advanced
Elastomer Systems, in Stow, Ohio. The phone number is 330-849-5000.
Haans K. Petruschke email haans@endura.com
Endura Plastics Inc. voice 216 951 4466 x22
7955 Chardon Rd. fax 216 256 3053
Kirtland, OH 44094-9531
Subject: Re: Free Radical Polymerizations in Water
From: jaspevacek@mmm.com (John Spevacek)
Date: Fri, 20 Dec 1996 08:22:24 -0800
Mahesh Chaubal wrote:
>
> Hi everyone:
>
> I was seeking some suggestions and info on free radical polymerizations
> across a double bond caried out at mild conditions in water.
>
> Can anyone provide any info or direct me to a good reference?
Try Odian, Principles of Polymerization, Allcock, Contemporary Polymer
Chemistry (Both of these are introductory), or Sandler and Kao, Polymer
Syntheses (more detailed).
John
--
A desk is a terrible spot to view the world from.
Opinions expressed herein are my own and may not represent those of my employer.
Subject: Re: How to Polymerize Methacrylates?
From: jaspevacek@mmm.com (John Spevacek)
Date: Fri, 20 Dec 1996 08:25:38 -0800
Barbara Belmont wrote:
>
> Can someone direct me to basic recipes for bulk polymerization of
> methacrylates? I'm specifically interested in how to produce a
> polymerization syrup, and finish things off to a nice clear colorless slab.
>
Sandler and Kao, Polymer Syntheses, Vol.1, Academic Press, 1992, p.333+
--
A desk is a terrible spot to view the world from.
Opinions expressed herein are my own and may not represent those of my employer.
