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Temperature‐responsive characteristics of N ‐isopropylacrylamide‐grafted polymer films prepared by photografting
Author(s) -
Kubota Hitoshi,
Nagaoka Noriyasu,
Katakai Ryoichi,
Yoshida Masaru,
Omichi Hideki,
Hata Yasuo
Publication year - 1994
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.1994.070510514
Subject(s) - photografting , photoinitiator , crystallinity , materials science , polymer chemistry , copolymer , substrate (aquarium) , polyethylene , polymer , chemical engineering , composite material , grafting , monomer , oceanography , engineering , geology
Photografting of N ‐isopropylacrylamide (NIPAAm) on ethylene–vinyl alcohol copolymer films (thickness = 15,20, and 25 μm) and low‐and high‐density polyethylene films (thickness = 30 μm) was carried out at 60°C in a water medium. Xanthone was used as a photoinitiator by coating it on the film samples. The resultant NIPAAm‐grafted films exhibited a temperature‐responsive character, which was evaluated by measuring a dimensional change of the grafted films. The grafted films swelled and shrank in water at temperatures lower and higher than around 30°C, respectively. The character was found to be reversible between 0 and 50°C. It was observed that the extent of the character is largely influenced by film thickness, location of NIPAAm‐grafted chains, and crystallinity of film substrate. © 1994 John Wiley & Sons, Inc.