ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Unperturbed dimensions of random copolymer molecules in binary mixed solvents

A. V. Gevorkyan

Vses. Nauchno-Issled. Proekt. Inst. Polim., Erevan, USSR.

Abstract: The polarity of θ-solvents (CHCl₃-acetone, PhMe-acetone, C₆H₆-MeOH, CCl₄-n-octane mixts.) has no effect on the intrinsic viscosity (η) and the unperturbed dimensions of chloroprene-dichlorobutadiene copolymer*(I). In all these solvent mixts. η is approx. equal to (mol. wt.)0.5. The dependence of the unperturbed I dimensions on its mol. wt. obeys the Stockmayer-Fixman relation. θ-Temps. were detd. for I in the solvent systems. The increase of θ-temp. by about 50.deg. decreases the unperturbed I dimensions by 15%. This is caused by the considerable sensitivity of I short-range interactions to the temp. changes.

Full paper in Portable Document Format: 253a196.pdf (in Russian)

Chemical Papers 25 (3) 196–202 (1971)