OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 42, Iss. 8 — Nov. 1, 1988
  • pp: 1543–1548

Measurement of Diffusivities of Small Molecules in Polymers Using FT-IR-ATR

J. R. Xu and C. M. Balik

Applied Spectroscopy, Vol. 42, Issue 8, pp. 1543-1548 (1988)


View Full Text Article

Acrobat PDF (613 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

A numerical method Is described for obtaining diffusion coefficients (D) of infrared-absorbing species in polymers using attenuated total reflectance infrared spectroscopy. It involves measurement of changes in the integrated intensity of diffusant infrared bands as a function of time while the diffusant moves into or out of the polymer film. The technique is illustrated with latex paint films containing a calcium carbonate extender which diffuses out of the paint films upon exposure to sulfurous acid. The values of D obtained from two different CaCO3 infrared bands were in good agreement with D obtained from independent bulk weight loss measurements. The method should be equally applicable to real-time diffusion analysis and to samples containing "frozen" concentration profiles of diffusant (as studied here). The results obtained in this preliminary study indicate that the method is probably best suited for measurement of diffusion coefficients smaller than 10−9 cm2/s.

Citation
J. R. Xu and C. M. Balik, "Measurement of Diffusivities of Small Molecules in Polymers Using FT-IR-ATR," Appl. Spectrosc. 42, 1543-1548 (1988)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-42-8-1543

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited