Compatibilité de polymères porteurs de groupements amides tertiaires avec le poly(difluoro‐1,1 éthylène). Etude par enthalpimétrie différentielle

Wiley - Tập 188 Số 6 - Trang 1391-1401 - 1987
Monique Galin1
1Institut Charles Sadron (CRM-EAHP) (CNRS-ULP), 6 rue Boussingault, 67083 Strasbourg cedex, France

Tóm tắt

AbstractThe miscibility of poly(1,1‐difluoroethylene) (1) with poly(N‐vinyl‐2‐pyrrolidone) poly(N‐methyl‐N‐vinylacetamide) and poly(N,N‐dimethylacrylamide), containingtert‐amido groups, was investigated by differential scanning calorimetry. Amorphous homogeneous blends were obtained whenever the weight fractions of polymer1is less than 0,7. The dependence of the single glass transition temperature (Tg) versus composition may be readily analyzed either through the Gordon‐Taylor equation (high values of thekparameter, suggesting strong specific interactions between the homopolymers) or by means of the Couchman relation (no adjustable parameter). The broadening of the glass transition range and the variation of the increment of specific heat atTgfor the blends are discussed.

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Wiley

Tập 188 Số 6

1391-1401

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