Blending of poly(L-lactic acid) with poly(cis-1,4-isoprene)

被引:41
作者
Jin, HJ
Chin, IJ
Kim, MN
Kim, SH
Yoon, JS [1 ]
机构
[1] Inha Univ, Sch Chem Sci & Engn, Inchon 402751, South Korea
[2] Sangmyung Univ, Dept Biol, Seoul 110743, South Korea
[3] Korea Adv Inst Sci & Technol, Div Polymers, Seoul 131, South Korea
关键词
D O I
10.1016/S0014-3057(99)00041-5
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Poly(L-lactic acid) (PLLA), a brittle biodegradable thermoplastic polymer, was blended with rubbery poly(cis-1,4-isoprene) (PIP). The PLLA/PIP blend, however, was incompatible as indicated by two T-g's, each stemming from PLLA and PIP domains, respectively. Since PLLA was known to be compatible with poly(vinyl acetate) (PVAc), PIP was grafted with vinyl acetate monomer to form PIP-g-PVAc, which was then blended with PLLA. The blend of PLLA and PIP-g-PVAc had two T-g's. The lower T-g, which was due to PIP phase, did not vary with the blend composition, while the higher T-g, which was due to PLLA rich phase, decreased with an increase in the graft copolymer content. The PVAc moiety of the graft copolymer seems to have been mixed in with PLLA. The tensile properties of the PLLA/PIP-g-PVAc blend were much superior to those of the PLLA/PIP blend. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:165 / 169
页数:5
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