Qi-fan WU, You-bing YANG, Zheng-qian SUN, Hong-juan ZHENG. Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation[J]. Polymer Bulletin, 2016,29(3):69-76.
Qi-fan WU, You-bing YANG, Zheng-qian SUN, Hong-juan ZHENG. Influences of Complex Catalytic System on the Synthesis of Poly(lactic acid) through Melt-solid Polycondensation[J]. Polymer Bulletin, 2016,29(3):69-76. DOI: 10.14028/j.cnki.1003-3726.2016.03.011.
Lactic acid was catalyzed by the complex catalytic system of SnCl
2
and TSA to study the influence on the Synthesis of PLA through Melt-solid Polycondensation
and the products of the polymer were characterized by Ubbelohde viscosity-average molecular
Fourier Transform infrared spectroscopy and Differential scanning calorimeter method. The results show that: The high molecular weight of PLA oligomer could be obtained
when the total content of composite catalyst is 0.6%(wt) (SnCl
2
and TSA all were 0.3%(wt)). When solid polymerization was carried out with a single component catalyst of 0.5%(wt) SnCl
2
the viscosity average molecular weight of the solid phase were increased to 3.7 times as compared with the melt polymerization. the molecular of PLA