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Control of biodegradability of poly(3‐hydroxybutyric acid) film with grafting acrylic acid and thermal remolding
Author(s) -
Wada Yuki,
Mitomo Hiroshi,
Kasuya KenIchi,
Nagasawa Naotsugu,
Seko Noriaki,
Katakai Akio,
Tamada Masao
Publication year - 2006
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.24189
Subject(s) - crystallinity , acrylic acid , grafting , differential scanning calorimetry , materials science , polymer chemistry , polymerization , contact angle , nuclear chemistry , chemistry , biodegradation , degradation (telecommunications) , chemical engineering , composite material , copolymer , polymer , organic chemistry , thermodynamics , engineering , telecommunications , physics , computer science
Radiation‐induced graft polymerization of acrylic acid (AAc) on poly(3‐hydroxybutyric acid) (PHB) film was carried out and the resulting film was thermally‐remolded. The PHB films grafted with AAc (PHB‐ g ‐AAc) having a degree of grafting higher than 5% completely lost the enzymatic degradability. The enzymatic degradability of the grafted film was recovered by thermal remolding. The highest enzymatic degradation rate was observed at degree of grafting of 10% after thermal remolding. The PHB‐ g ‐AAc films and thermally‐remolded PHB‐ g ‐AAc films were characterized by contact angle and differential scanning calorimetry. The enzymatic degradability of PHB‐ g ‐AAc films was lost by the grafted AAc, which covered the surface of PHB film. The acceleration of enzymatic degradation in the remolded PHB‐ g ‐AAc films was mainly caused by decrease of crystallinity of PHB by dispread of grafted AAc during thermal remolding. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3856–3861, 2006