PE-g-MAH增强LDPE/CSW改性导爆管的制备与研究
Preparation and Research of PE-g-MAH Reinforced LDPE/CSW Modified Nonel Tube
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摘要:为了进一步提高LDPE/CSW改性导爆管的强度、耐热性，拟用PE-g-MAH增强LDPE与CSW界面相容性，制备了LDPE/CWS/PE-g-MAH共融物试样及导爆管产品。通过观察试样断面，测试试样及导爆管的抗拉性能、熔融与结晶峰值温度、动力学分析、热收缩性，得到结果为：仅1%的PE-g-MAH足以将LDPE与晶须之间结合力提升至饱和，拉伸强度较LDPE/CSW试样提高11.53%；熔融温度、结晶温度均向高温区偏移，且表观活化能升高；1%PE-g-MAH的改性导爆管的最大断裂力较普通导爆管提高33.75%，其耐热收缩性能增强，且最大热收缩速率对应温度向高温区偏移了4℃。元最小平均发火电压低于5V。
Abstract:In order to further improve the strength and heat resistance of LDPE/CSW modified nonel tube, PE-g-MAH was proposed to enhance the interfacial compatibility between LDPE and CSW, and LDPE/CWS/PE-g-MAH blends and nonel tube products were prepared. The observation of the interface between LDPE and whisker was carried out, the tensile properties, melting and crystallization peak temperature, kinetic analysis and thermal shrinkage of the sample or nonel tube were tested. Research shows that only 1% content of PE-g-MAH is enough to enhance the adhesion between LDPE and whisker to saturation, and the tensile strength of sample is increased by 11.53% compared to that of LDPE/CSW, the melting temperature, crystallization temperature are all shifted to high temperature zone and apparent activation energy is increased, the maximum fracture force of modified nonel tube with 1% content of PE-g-MAH is 33.75% higher than that of ordinary nonel tube, meanwhile, the thermal shrinkage resistance of the modified nonel tube is increased, and the temperature corresponding to maximum thermal shrinkage rate shifts 4℃ to the high temperature region.
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