Functionalization of medium-chain-length poly(3-hydroxyalkanoates) as amphiphilic material by graft copolymerization with glycerol 1,3-diglycerolate diacrylate and its mechanism

被引:9
|
作者
Ansari, Nor Faezah [1 ,2 ]
Annuar, M. Suffian M. [1 ]
机构
[1] Univ Malaya, Fac Sci, Inst Biol Sci, Biotechnol Div, Kuala Lumpur, Malaysia
[2] Int Islamic Univ Malaysia, Kuliyyah Sci, Dept Biotechnol, Kuantan 25200, Pahang, Malaysia
来源
JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY | 2018年 / 55卷 / 01期
关键词
Functionalization; Medium-chain-length poly-3-hydroxyalkanoates; Glycerol 1,3-diglycerolate diacrylate; Graft copolymerization; Mechanism;
D O I
10.1080/10601325.2017.1387490
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Glycerol 1,3-diglycerolate diacrylate (GDD) was graft copolymerized onto poly(3-hydroxyoctanoate-co-3-hydroxyhexanoate) P(3HO-co-3HHX) to render the latter more hydrophilic. Grafting of P(3HO-co-3HHX) backbone was performed using benzoyl peroxide as free radical initiator in homogenous acetone solution. The graft copolymer of P(3HO-co-3HHX)-g-GDD was characterized using spectroscopic and thermal methods. The presence of GDD monomer in the grafted P(3HO-co-3HHX) materials linked through covalent bond was indicated by spectroscopic analyses. Different parameters affecting the graft yield viz. monomer concentration, initiator concentration, temperature and reaction time were also investigated. Water uptake measurement showed that P(3HO-co-3HHX)-g-GDD copolymer became more hydrophilic as the GDD concentration in the copolymer increased. Introduction of hydroxyl groups via grafted GDD monomers improved the wettability and imparted amphiphilicity to the graft copolymer, thus potentially improving their facility for cellular interaction. Thermal stability of grafted copolymer reduced with increased grafting yield. The activation energy, E-a, for the graft copolymerization was calculated at similar to 51 kJ mol(-1). Mechanism of grafting reaction was also proposed.
引用
收藏
页码:66 / 74
页数:9
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