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通过原位聚合制备了纳米氧化锌颗粒增强不同添加量和分子量的聚乙二醇(PEG)与聚对苯二甲酸乙二醇酯(PET)共聚物的复合材料。研究了纳米粒子在基体里的分散,以及纳米粒子和PEG对复合材料结晶行为的影响。结果显示,纳米粒子在基体中以纳米尺度分散起晶核作用。PEG的加入使得纳米粒子分散更加均匀,PEG分子链段改善了PET分子链的柔性,由此导致复合材料的冷结晶温度降低,结晶速率提高。研究发现,当添加10%分子量为4000的PEG时,复合材料的结晶速率快速提高。复合材料的力学性能结果说明,纳米粒子对PET基体有增强增韧作用,但PEG会弱化该作用。
The nano-ZnO particles were prepared by in-situ polymerization of polyethylene glycol (PEG) and polyethylene terephthalate (PET) copolymers with different additive amounts and molecular weights. The dispersion of nanoparticles in the matrix and the effect of nanoparticles and PEG on the crystallization behavior of the composites were studied. The results show that the nano-particles dispersed in the matrix at the nano-scale nuclei role. The addition of PEG makes the dispersion of nanoparticles more uniform. The PEG molecular chain improves the flexibility of PET molecular chain, resulting in the decrease of cold crystallization temperature and the increase of crystallization rate. The study found that when adding 10% PEG 4000 molecular weight, the rapid increase in the crystallization rate of the composite material. The mechanical properties of the composites The results show that the nanoparticles of the PET matrix has enhanced toughening, but PEG will weaken the role.