| 利用KH560和纳米SiO2采用“一步法”反应挤出增黏PET |
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| 引用本文： | 胡肖霞,王亮,冯杰.利用KH560和纳米SiO2采用“一步法”反应挤出增黏PET[J].化工进展,2020,39(7):2768-2774. |
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| 作者姓名： | 胡肖霞 王亮 冯杰 |
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| 作者单位： | 浙江工业大学材料科学与工程学院，浙江 杭州 310014 |
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| 摘 要： | 以KH560（3-缩水甘油基氧基丙基三甲氧基硅烷）和纳米SiO2颗粒复配作为扩链剂，采用“一步法”反应挤出增黏聚对苯二甲酸乙二醇酯（PET）。KH560和SiO2的添加量均为PET质量分数的2.5%时，增黏效果最好。并且在PET不干燥的情况下，KH560和SiO2复配也可增加PET的黏度，可用作PET的扩链剂和防水解剂。经透射电镜观察，发现SiO2在PET中的分散状况良好。用FTIR研究了KH560、SiO2、PET三者之间的反应机理。用TGA分析了SiO2的接枝率，发现接枝率高达72.0%。用DSC对PET/纳米SiO2复合材料的结晶行为进行了研究，并讨论了结晶行为对力学性能的影响。当KH560和SiO2的添加量均为PET质量分数的2.5%时，结晶度最低，综合力学性能最好。
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| 关 键 词： | 聚对苯二甲酸乙二醇酯 二氧化硅 反应挤出 增黏 扩链剂 |
Increase the viscosity of PET by one-step reaction extrusion with KH560
and nano-SiO2 as chain extender |
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| HU Xiaoxia,WANG Liang,FENG Jie.Increase the viscosity of PET by one-step reaction extrusion with KH560
and nano-SiO2 as chain extender[J].Chemical Industry and Engineering Progress,2020,39(7):2768-2774. |
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| Authors: | HU Xiaoxia WANG Liang FENG Jie |
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| Affiliation: | College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China |
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| Abstract: | KH560 (3-glycidyloxypropyltrimethoxysilane) and nano-SiO2 particles were filled into PET melt by extrusion process to increase the melt viscosity of the PET. When the KH560 and the SiO2 particles were both filled at 2.5%(mass ratio), the melt viscosity-increasing effect was the best. Moreover, even the PET was not dried, the PET melt viscosity can also be improved by such chain extender, implying that it can be used as a regent to prevent the hydrolytic degradation of PET. Transmission electron microscopy imaging showed that the dispersion of nano-SiO2 in PET was well. The reaction mechanism between KH560, SiO2 and PET was confirmed by FTIR. The grafting of PET molecules to SiO2 nanoparticles was analyzed by TGA, and the graft ratio was 72%. The crystallization behavior of the PET/ SiO2 composites was studied by DSC. When the KH560 and SiO2 nanoparticles were both filled at 2.5% (mass ratio), the crystallinity of PET/nano-SiO2 composite is the lowest and the comprehensive mechanical properties were the best. |
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| Keywords: | polyethylene terephthalate silicon dioxide reaction extrusion viscosity increasing chain extender |
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