Google Answers Logo
View Question
Q: Permeability of HFC-134a across various thin walled polymers ( No Answer,   0 Comments )
Subject: Permeability of HFC-134a across various thin walled polymers
Category: Science > Chemistry
Asked by: trevorlom-ga
List Price: $100.00
Posted: 28 Mar 2006 14:35 PST
Expires: 29 Mar 2006 14:03 PST
Question ID: 712901
I need to get some rough calculations done on the permeability of
HFC-134a across various polymers (polyamide, polyethylene
terephthalate, etc) at different pressures and different wall
thicknesses of 0.25mm - 0.75mm. Ideally I would like an Excel
spreadsheet created that I could plug in different values.  I am
trying to determine if I can make a small injected molded part
containing HFC-134a (Chemical Name 1,1,1,2-tetrafluoroethane,
Molecular Formula CH2FCF3) under pressure. The part would be a tiny
doughnut shaped container with the gas at 80psi - 100psi. I need to
determine what mass of gas and how much pressure I would lose over a
two year period. Additionally, I would look for suggestions and
calculations on how to improve the permeability of the polymer with
coatings and/or unique blends. I can provide more detail.
There is no answer at this time.

There are no comments at this time.

Important Disclaimer: Answers and comments provided on Google Answers are general information, and are not intended to substitute for informed professional medical, psychiatric, psychological, tax, legal, investment, accounting, or other professional advice. Google does not endorse, and expressly disclaims liability for any product, manufacturer, distributor, service or service provider mentioned or any opinion expressed in answers or comments. Please read carefully the Google Answers Terms of Service.

If you feel that you have found inappropriate content, please let us know by emailing us at with the question ID listed above. Thank you.
Search Google Answers for
Google Answers  

Google Home - Answers FAQ - Terms of Service - Privacy Policy