Title

The true molecular weight distributions of acrylate polymers formed in propagating fronts

Document Type

Article

Publication Date

4-30-1996

Abstract

We have analyzed fractionated samples of poly(methacrylic acid) produced in a propagating front for the amount of anhydride that formed and determined that a large percentage of acid groups exist as anhydrides (>20%). By analyzing the samples after cleavage, we found that the molecular weight dropped significantly (from Mn = 1.4 × 105 to Mn = 1.0 × 104). We conclude that the high molecular weights observed previously were the result of intermolecular anhydride formation. Poly(butyl acrylate), which cannot form anhydride bonds, produced in fronts had broad (Mw/Mn = 1.7-2.0) but unimodal molecular weight distributions with Mw < 105. The average molecular weight decreased with increasing initiator concentrations. © 1996 John Wiley & Sons, Inc.

Publication Source (Journal or Book title)

Journal of Polymer Science, Part A: Polymer Chemistry

First Page

991

Last Page

995

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