摘要
研究了成核剂纳米氧化镁和纳米氧化硅对聚对苯二甲酸乙二醇酯(PET)结晶速率的影响。通过等温结晶差热分析(DSC)研究了纳米氧化镁在不同含量、不同温度下对PET等温结晶行为的影响。用纳米氧化镁和纳米氧化硅填充PET体系的非等温结晶DSC,由所得冷结晶峰温度值和热结晶峰温度值的对比,探索纳米成核剂对PET结晶速率的影响及其规律。研究结果表明:纳米成核剂均能明显提高PET的结晶速率,而纳米氧化镁比纳米氧化硅对促进PET的结晶效果更好;添加不同含量的纳米氧化镁对PET在不同温度下的等温结晶影响不同,在所研究的范围内,1.0%的添加量较有利于PET的结晶。
The nucleation effects of nano-MgO and nano-SiO_2 during the crystallization of polyethylene terephthalate (PET) was investigated using differential scanning calorimetry (DSC). It indicated that nano-nucleating agents MgO and SiO_2 provided heterogeneous nucleation sites for the PET crystallization with nano-MgO being better than nano-SiO_2. The content of nano-MgO had a major effect on the iso-thermal crystallization of nano-MgO/PET composites and (1.0 wt %) of MgO was considered as an optimum at (125 .)
出处
《中国塑料》
CAS
CSCD
北大核心
2005年第3期32-35,共4页
China Plastics
关键词
聚对苯二甲酸乙二醇酯
纳米成核剂
结晶速率
<Keyword>polyethylene terephthalate
nano-nucleating agent
crystallization rate
