OALib Journal期刊
ISSN: 2333-9721
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增塑剂对碱木质素/HDPE复合材料性能影响研究
DOI: 10.3724/SP.J.1105.2014.13204 , PP. 210-217
Keywords: 碱木质素 ,HDPE ,复合材料 ,增塑机理 ,流变行为
Abstract:
分别采用邻苯二甲酸二辛酯(DOP)、邻苯二甲酸二丁酯(DBP)、环氧大豆油(ESO)作为增塑剂制备碱木质素/HDPE复合材料.研究了不同种类增塑剂对复合材料力学性能的影响,结果表明,3种增塑剂都能提高复合材料的断裂拉伸率,其中DOP的效果最优,当DOP添加量为7.5phr,复合材料的断裂拉伸率达146.28%,比未添加增塑剂的样品高62.4%.添加DOP制备复合材料,研究DOP对复合材料力学性能、断面形貌、流变性能的影响.复合材料的力学性能结果表明DOP含量的增加有利于复合材料断裂拉伸率的提高;SEM表明DOP的添加使复合材料的断面变的更加粗糙,材料韧性提高;流变性能结果表明DOP能降低复合材料的表观黏度(η)和复数黏度(η*),并且线性黏弹区随着DOP含量的增加而变窄,储能模量(G’)和损耗模量(G")也逐渐下降.分析认为,DOP分子吸附包覆在木质素微颗粒的表面,抑制了木质素微颗粒在HDPE相中的团聚,改善了木质素在HDPE中的分散状况,同时降低了木质素分子和聚乙烯分子链之间的作用力,从而改善了复合材料的力学性能和流变性能.
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