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Construction of inter‐chain polymers and the investigation into Friedel–Crafts alkylation of styrene–acrylonitrile copolymers with chloroprene rubber and characterization
Author(s) -
Wei Xuefeng,
Zhang Pengcheng,
Cui Shen,
Che Wei,
Zhao Jiruo,
Feng Ying
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49897
Subject(s) - chloroprene , copolymer , acrylonitrile , materials science , polymer , friedel–crafts reaction , polymer chemistry , natural rubber , differential scanning calorimetry , styrene , fourier transform infrared spectroscopy , chemical engineering , catalysis , organic chemistry , chemistry , composite material , physics , engineering , thermodynamics
Abstract In this study, the Friedel–Crafts alkylation was realized in a solvent free processing of styrene–acrylonitrile copolymers/chloroprene rubber (SAN/CR) molten blending which contributes the formation of SAN‐co‐CR co‐polymers and improved compatibility between SAN and CR. The properties of several Lewis acid compounds were tested as catalysts among which AlCl 3 was the most efficient. The effects of blending temperature and time on the co‐polymer formation in situ were also investigated. The methodology of weighing and Fourier transform infrared analyses indicated that the reaction degree increases with increasing blending temperature and time in the ranges of this study. The micro‐structures and reaction mechanisms of the resulted SAN‐co‐CR polymers and morphological structures of SAN/CR/AlCl 3 blends were characterized as well by differential scanning calorimetry, FT‐IR spectra, GPC and scanning electron microscopy. The results showed that the inter‐facial reactions between SAN and CR have been effectively improved. Moreover, the inter‐chain structure of SAN‐co‐CR co‐polymers was proposed which is different from general grafting or blocking co‐polymers.