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Chemical recycling of polyhydroxyalkanoates as a method towards sustainable development
Author(s) -
Ariffin Hidayah,
Nishida Haruo,
Hassan Mohd Ali,
Shirai Yoshihito
Publication year - 2010
Publication title -
biotechnology journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.144
H-Index - 84
eISSN - 1860-7314
pISSN - 1860-6768
DOI - 10.1002/biot.200900293
Subject(s) - polyhydroxyalkanoates , degradation (telecommunications) , biorefinery , copolymer , catalysis , acrylic acid , glass transition , polymer , monomer , chemistry , biodegradation , pyrolysis , organic chemistry , polymer chemistry , chemical engineering , raw material , bacteria , telecommunications , genetics , computer science , engineering , biology
Chemical recycling of bio‐based polymers polyhydroxyalkanoates (PHAs) by thermal degradation was investigated from the viewpoint of biorefinery. The thermal degradation resulted in successful transformation of PHAs into vinyl monomers using alkali earth compound (AEC) catalysts. Poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate)s (PHBVs) were smoothly and selectively depolymerized into crotonic (CA) and 2‐pentenoic (2‐PA) acids at lower degradation temperatures in the presence of CaO and Mg(OH) 2 as catalysts. Obtained CA from 3‐hydroxybutyrate sequences in PHBV was copolymerized with acrylic acid to produce useful water‐soluble copolymers, poly(crotonic acid‐ co ‐acrylic acid) that have high glass‐transition temperatures. The copolymerization of CA derived from PHA pyrolysis is an example of cascade utilization of PHAs, which meets the idea of sustainable development.