摘要
单糖分子为原料,Koenigs-Knorr法合成一种带羧基和多羟基的糖苷衍生物,以此糖苷衍生物为单体制备超支化聚酯。用傅里叶变换红外光谱、核磁共振波谱、凝胶渗透色谱、差示扫描量热分析和热重分析表征中间产物和超支化聚酯结构。超支化聚酯与聚乳酸共混制备复合膜,扫描电镜观测复合膜的相容性,拉力试验测试复合膜的力学性能,差示扫描量热分析复合膜的热性能,接触角测量仪测试复合膜的润湿性。结果表明,成功合成了超支化聚酯目标产物,超支化聚酯的相对分子质量随代数的增加而上升,支化度较高,热稳定性较好。超支化聚酯与聚乳酸相容性良好,共混之后聚乳酸的力学性能、热性能及润湿性均有提高。
Glucose was used as raw material to prepare glucoside derivative with carboxyl and polyhydroxy by Koenigs-Knorr method, and a new kind of hyperbranched polyester （HBP） was prepared by using derivative as hyperbranched monomer. The structure of intermediates and HBP was characterized by Fourier transform infrared spectroscopy （FT-IR）, nuclear magnetic resonance spectroscopy （NMR）, gel permeation chromatography （GPC）, differential scanning calorimetry （DSC） and thermal gravimetric analysis （TG）. The HBP was blended with polylactic acid （PLA） to make the composite film. The compatibility of composite film was explored by scanning electron microscope （SEM）. The mechanical property of composite film was measured by tension test. The thermal properties of composite film were analyzed by DSC. The wettability of composite film was tested by optical angle measurement. The experimental results show that the structure of intermediates and end products consist with that of design, the molecular weight of the HBP rises with increasing generation, HBP has the high branching degree and good thermal stability. The compatibility of HBP and PLA is good, and the mechanical properties, thermal properties and wettability of PEA are improved after blending with HBP.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2017年第3期30-37,共8页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(31470587)
浙江省省院合作科技项目(2015SY11)
关键词
超支化聚酯
聚乳酸
热性能
相容性
hyperbranched polyester
polylactic acid
thermal properties
compatibility
