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Synthesis and controlled photo‐ and biodegradabilities of poly[(hydroxybutyrate ‐ Co ‐hydroxyvalerate)‐ G ‐styrene]
Author(s) -
Park Jin,
Choi WonMoon,
Ha ChangSik,
Kim WonHo,
Cho WonJei
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981300106
Subject(s) - styrene , benzoyl peroxide , grafting , copolymer , materials science , nuclear chemistry , thermal decomposition , polymerization , biodegradation , ultimate tensile strength , polymer chemistry , chemistry , composite material , polymer , organic chemistry
The graft copolymer, P(HBV‐g‐St), was synthesized by graft polymerization of styrene (St) onto poly(3‐hydroxybutyrate‐co‐3‐hydroxy valerate) [PHBV] under nitrogen atmosphere using benzoyl peroxide (BPO). The structure of poly[(hydroxybutyrate‐co‐hydroxyvalerate)‐g‐styrene] [P(HBV‐g‐St)] was identified by FT‐K, 1 H‐NMR, and 13 C‐NMR spectra. The effects of weight ratio of St to PHBV in feed, initiator concentration, reaction time and reaction temperature on the grafting ratio and grafting efficiency were investigated. The thermal decomposition temperature of P(HBV‐g‐St) was 273°C. The tensile strengths of P(HBV‐g‐St) before and after photo‐ or biodegradation were also measured. The photodegradability of P(HBV‐g‐St) was better than that of PHBV. The film surface of P(HBV‐g‐St) treated with Aspergillus nigger showed extensive grooves and pits as compared with the untreated P(HBV‐g‐St). It was found that the photo‐ and biodegradation rates of P(HBV‐g‐St) and tensile strength of P(HBV‐g‐St) can be “controlled” by changing the weight ratio of St to PHBV in feed.