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Preparation of temperature‐sensitive polymer films by surface photografting techniques
Author(s) -
Li Bin,
Chen Wenguang,
Liu Xiaohua,
Wang Xiaogong,
Zhou Qixiang
Publication year - 2002
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/pat.180
Subject(s) - photografting , materials science , yield (engineering) , grafting , polypropylene , polymer chemistry , monomer , humidity , polymer , chemical engineering , composite material , meteorology , physics , engineering
In this paper, poly(N‐isopropylacrylamide) has been successfully grafted on polypropylene (PP) films by pre‐dipping photografting and dormant radical photografting techniques. It was found that higher grafting yield was achieved by the dormant radical photografting method. An optimum concentration of N‐isopropylacrylamide monomer existed both for the pre‐dipping photografting and for the dormant radical photografting methods. The grafting yield was improved by increasing the UV irradiation time for both methods. Water absorbency of grafted PP films prepared by the two methods was similar and increased nearly linearly with the improvement of grafting yield. At constant temperature and humidity, the grafted PP films lost the absorbed water continually before the water absorbency reached an equilibrium value at this temperature. Copyright © 2002 John Wiley & Sons, Ltd.