共 23 条
The starch grafted poly(L-lactide) and the physical properties of its blending composites
被引:123
作者:
Chen, L
Qiu, XY
Deng, MX
Hong, ZK
Luo, R
Chen, XS
[1
]
Jing, XB
机构:
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] NE Normal Univ, Dept Chem, Changchun 130022, Peoples R China
来源:
基金:
中国国家自然科学基金;
关键词:
starch;
surface modification;
grafting polymerization;
D O I:
10.1016/j.polymer.2005.05.053
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
A new method of the surface modified starch (SM-St) by grafting reaction of the hydroxyl groups on the starch with L-lactic acid was developed. A novel biodegradable starch grafted copolymer, starch-g-poly(L-lactide) (St-g-PLLA), was synthesized in situ by the ring-opening graft polymerization of a L-lactide (LLA) monomer onto the surface of the SM-St granules in the presence of Sn(Oct)(2) as a catalyst. The PLLA grafting efficiency could reach as high as 64 wt%. The structure of St-g-PLLA was characterized by IR, DSC and WAXD. The good adhesion between the two components had been evidenced by SEM observations. The medium-resistance of St-g-PLLA and the mechanical properties of the PLLA composite blending with St-g-PLLA were much better than that of the PLLA/starch blending composite. (c) 2005 Elsevier Ltd. All rights reserved.
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页码:5723 / 5729
页数:7
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