Nano-ZnO particle （nZnOp） reinforced polyethylene glycol （PEG）/polyethylene terephthalate （PET） （nZnOp/PEG/PET） copolymeric composites with different mass fractions and molecular weights of PEG are synthesized...Nano-ZnO particle （nZnOp） reinforced polyethylene glycol （PEG）/polyethylene terephthalate （PET） （nZnOp/PEG/PET） copolymeric composites with different mass fractions and molecular weights of PEG are synthesized via in-situ polymerization. The dispersion of nZnOp in copolymer matrixes and the effects of PEG and nZnOp particles on the crystallization behavior of the composites are studied by TEM, differential scanning calorimetry（DSC）, XRD and Fourier thansform infrared spectroscopy （FTIR ）. The results reveal that nZnOp particles are dispersed in the matrixes with nano-scale, and the addition of PEG induces more homogeneous dispersion of nZnOp. Simultaneously, these nanoparticles become nucleating centers during the crystallization of the matrixes. PEG segments can improve the flexibility of the PET molecular chain, resulting in the drop of the cold crystallization temperature and the rise of the crystallization rate of the composites. Furthermore, PEG （4 000） with the mass fraction of 10% can promote the crystallization rate of the composites. The mechanical properties show that the nano-particles strengthen and toughen the PET matrix, whereas PEG weakens these improve- ments.展开更多
在微波辐射下,先将歧化松香与聚乙二醇进行酯化反应,合成中间体歧化松香聚乙二醇酯,再将中间体与苹果酸进行酯化反应,合成目标产物歧化松香聚乙二醇苹果酸酯,研究了中间体和目标产物的合成条件。结果表明:①中间体合成的最佳条件为:反...在微波辐射下,先将歧化松香与聚乙二醇进行酯化反应,合成中间体歧化松香聚乙二醇酯,再将中间体与苹果酸进行酯化反应,合成目标产物歧化松香聚乙二醇苹果酸酯,研究了中间体和目标产物的合成条件。结果表明:①中间体合成的最佳条件为:反应时间90 m in,反应温度240℃,歧化松香与聚乙二醇的摩尔比为1∶1.6;②目标产物合成的最佳条件为:反应时间60 m in,反应温度140℃,微波功率800 W。利用IR、UV等测试技术对中间体及目标产物进行了结构表征,并测定了它们的主要表面性能。结果表明,中间体和目标产物均为性能优良的新型非离子表面活性剂。展开更多
基金Supported by the Program of Jiangsu Development & Reform Commission(2005)the Industrial-ization Boosting Program of College Scientific Reserach Achievements of the Education Department of Jiangsu Province(JHB06-03)~~
文摘Nano-ZnO particle （nZnOp） reinforced polyethylene glycol （PEG）/polyethylene terephthalate （PET） （nZnOp/PEG/PET） copolymeric composites with different mass fractions and molecular weights of PEG are synthesized via in-situ polymerization. The dispersion of nZnOp in copolymer matrixes and the effects of PEG and nZnOp particles on the crystallization behavior of the composites are studied by TEM, differential scanning calorimetry（DSC）, XRD and Fourier thansform infrared spectroscopy （FTIR ）. The results reveal that nZnOp particles are dispersed in the matrixes with nano-scale, and the addition of PEG induces more homogeneous dispersion of nZnOp. Simultaneously, these nanoparticles become nucleating centers during the crystallization of the matrixes. PEG segments can improve the flexibility of the PET molecular chain, resulting in the drop of the cold crystallization temperature and the rise of the crystallization rate of the composites. Furthermore, PEG （4 000） with the mass fraction of 10% can promote the crystallization rate of the composites. The mechanical properties show that the nano-particles strengthen and toughen the PET matrix, whereas PEG weakens these improve- ments.
文摘在微波辐射下,先将歧化松香与聚乙二醇进行酯化反应,合成中间体歧化松香聚乙二醇酯,再将中间体与苹果酸进行酯化反应,合成目标产物歧化松香聚乙二醇苹果酸酯,研究了中间体和目标产物的合成条件。结果表明:①中间体合成的最佳条件为:反应时间90 m in,反应温度240℃,歧化松香与聚乙二醇的摩尔比为1∶1.6;②目标产物合成的最佳条件为:反应时间60 m in,反应温度140℃,微波功率800 W。利用IR、UV等测试技术对中间体及目标产物进行了结构表征,并测定了它们的主要表面性能。结果表明,中间体和目标产物均为性能优良的新型非离子表面活性剂。
