Effect of initiators on synthesis of poly(L-lactide) by ring opening polymerization

被引：22
|
作者：
Pholharn, D. [1 ]
Srithep, Y. [2 ]
Morris, J. [2 ]
机构：
[1] Rajabhat Maha Sarakham Univ, Fac Sci & Technol, Dept Chem, Maha Sarakham 44000, Thailand
[2] Mahasarakham Univ, Mfg & Mat Res Unit, Fac Engn, Maha Sarakham 44150, Thailand
来源：
2017 GLOBAL CONFERENCE ON POLYMER AND COMPOSITE MATERIALS (PCM 2017) | 2017年 / 213卷
关键词：
POLY(LACTIC ACID);
D O I：
10.1088/1757-899X/213/1/012022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We studied the effect of several aliphatic alcohols, including1-dodecanol, 1-octanol and methanol, as initiators on synthesis of poly(L-lactide) (PLLA) by ring opening polymerization. The reaction starts with L-lactide monomer and uses stannous octoate as catalyst. Fourier transform infrared spectroscopy and X-ray diffraction analysis verified that PLLAs were produced successfully. Weight, number average molecular weight and polydispersity index of PLLAs were measured by gel permeation chromatography. The PLLA initiated by methanol (PLLA-Meth) presented the highest molecular weight and yield percent. From differential scanning calorimetry, PLLA-Meth showed the highest melting temperature at similar to 167 degrees C, crystallization temperature at 110 degrees C and degree of crystallinity 80%. The thermal stability was assessed by thermogravimetric analysis: this confirmed that PLLA-Meth was superior with the highest degradation temperature compared to PLLA initiated by other initiators. We concluded that methanol was the most appropriate initiator for PLLA synthesis by ring opening polymerization.
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页数：8
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