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Monte Carlo simulation of sequence distributions of acrylonitrile copolymers

✍ Scribed by Chen Hou; Chun-feng Sun; Liang Ying; Cheng-guo Wang

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
77 KB
Volume
96
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

A Monte Carlo simulation examining the effect of monomer ratios on the composition and sequence distribution of acrylonitrile(AN) copolymers with N‐vinyl pyrrolidone (NVP), itaconic acid (IA), and acrylic acid (AA) as comonomers has been developed. The Kelen–Tudos method was used to estimate monomer reactivity ratios. The results of the simulation are consistent with the academic conclusion and are as foreseen by the experimental data. The average number of NVP identical monomers in a sequence length of AN/NVP copolymer chain increases continuously and the average number of AN identical monomers in a sequence length shows a prominent decrease with an increase of NVP concentration in the feed. Changes in the monomer average number of AN/IA and AN/AA copolymers in a sequence length were the same as those of AN/NVP copolymer with an increase of comonomer concentration in the feed. The optimum weight ratio of AN with comonomers for manufacturing carbon fibers is 98/2. Β© 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 483–488, 2005

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