Effect of end-group modification of poly(lactide)s by cinnamoyl chloride on their thermal stability

被引：7
|
作者：
Nakayama, Yuushou [1 ]
Matsubara, Naoki [1 ]
Cai, Zhennguo [2 ]
Shiono, Takeshi [1 ]
Inumaru, Kei [1 ]
Shirahama, Hiroyuki [3 ]
机构：
[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan
[2] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
[3] Hiroshima Univ, Ctr Collaborat Res & Community Cooperat, Higashihiroshima 7390046, Japan
来源：
POLYMER DEGRADATION AND STABILITY | 2017年 / 141卷
关键词：
Poly(L-lactide); End-group modification; Cinnamoyl chloride; Thermal stability; Residual Sn; Stereocomplex polylactide; STEREOCOMPLEX FORMATION; CYCLIC ESTERS; L-LACTIDE; POLYMERIZATION; DEGRADATION; POLYMERS; POLYLACTIDES; COMPLEXES; MECHANISM; BEHAVIOR;
D O I：
10.1016/j.polymdegradstab.2017.05.015
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In order to improve thermal stability of poly(L-lactide) (PLLA), the terminal hydroxy groups of PLLAs were converted to cinnamate esters by the treatment with cinnamoyl chloride. The resulting end-group modified PLLAs exhibited much higher thermal degradation temperature at 10% weight loss (Tdie) at around 320 degrees C than those of the starting hydroxy-terminated PLLAs (ca. 240 degrees C). The amounts of the residual Sn in the PLLAs were estimated by ICP measurements before and after modification, which indicated the modified PLLAs were still contaminated with ca. 600 ppm of Sn. This suggested that the end-group modification is effective for improving thermal stability of PLLA even in the presence of Sn. The end-group modification was also applicable to the stabilization of stereocomplex poly(lactide)s, whose thermal stability is important due to their high processing temperature. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：97 / 103
页数：7
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