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Molecular weight, casting conditions and the mechanical strength of acrylonitrile–maleic anhydride copolymer membrane
Author(s) -
Pei YuXin,
Wang QingRui
Publication year - 1999
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199907)10:7<434::aid-pat889>3.0.co;2-8
Subject(s) - acrylonitrile , copolymer , casting , materials science , maleic anhydride , membrane , composite material , izod impact strength test , evaporation , polymer chemistry , chemical engineering , polymer , ultimate tensile strength , chemistry , thermodynamics , biochemistry , physics , engineering
The effects of molecular weight and casting conditions on the separation performance of acrylonitrile–maleic anhydride copolymer membrane have been discussed , and their effects on the mechanical property of the membrane investigated. The casting conditions included concentration of casting solution, pre‐evaporation time, and temperatures of casting solution and coagulation bath. The breaking strength increased with an increase in molecular weight and concentration of casting solution. There was a minimum value of breaking strength when the pre‐evaporation time was 40 sec and a maximum value when the temperature of casting solution was 40 °C or the temperature of the coagulation bath was 35 °C. Though the breaking strength of an acrylonitrile–maleic anhydride copolymer membrane can be improved by selecting casting conditions, it is more efficient to increase the molecular weight of the copolymer. The breaking strength of a copolymer membrane with an M w of 3.4 × 10 5 was 309 N/cm 2 . Copyright © 1999 John Wiley & Sons, Ltd.