固相剪切碾磨制备高填充聚丙烯木塑复合材料的形貌结构与力学性能_百

固相剪切碾磨制备高填充聚丙烯木塑复合材料的形貌结构与力

学性能

牛志海;陈英红;白时兵

【期刊名称】《化工学报》

【年(卷),期】2014(000)012

【摘 要】By taking advantage of the excellent multi-functions, including

pulverization, dispersion, mixing and stress reaction of the pan-mill

equipment and the good compatibilizing effects of the compatibilizer PP-

g-MAH, the highly filled polypropylene (PP) wood-plastic composite with

80%(mass) wood flour (WF) having good comprehensive performance was

prepared. The effects of pan-milling, compatibilizer and compounding

strategy on the particle size distribution, mechanical performance and

morphology structure of the PP/WF wood-plastic composite system were

investigated. The particle size of the PP/WF composite at different milling

occurred at 5% PP-g-MAH. In addition, the mechanical properties of the

PP/WF composite prepared by pan-milling were better than those of the

material prepared by the conventional mastication compounding method.

The change in mechanical properties mentioned above was attributed to

improved dispersion of wood flour in PP/WF highly filled composite

system caused by pan-milling and remarkable enhancement in

compatibility of system caused by the incorporated PP-g-MAH. The

involved compatibilizing mechanism of PP-g-MAH was believed to be the

mechano-chemical grafting esterification reaction of PP-g-MAH with the

hydroxyl groups at the surface of wood flour under the strong shear force

field of pan-milling.%利用磨盘形力化学反应器优异的粉碎、分散、混合和力化

学反应的多重功能以及增容剂PP-g-MAH的良好增容作用制备了综合性能优良的

聚丙烯(PP)/木粉(WF,80%，质量分数)高填充木塑复合材料，研究了磨盘碾磨、增

容剂以及复合方式对PP/WF木塑复合体系的粒径分布、力学性能和形貌结构等的

影响。结果表明，不同碾磨次数的PP/WF复合粉体的粒径呈双峰分布，适当增加

碾磨次数有利于PP粒径的降低及木粉的均匀分散。随碾磨次数的增加，PP/WF

复合材料的拉伸和弯曲性能先增加后下降，但缺口冲击强度一直呈小幅下降趋势。

PP-g-MAH的引入及其含量增加均有利于PP/WF复合材料力学性能的大幅改善，

其中弯曲模量在增容剂含量为5%（质量分数）时最佳。此外，磨盘碾磨制备的

PP/WF复合材料的力学性能优于常规密炼复合法。上述力学性能变化归因于磨盘

碾磨改善了 PP/WF 高填充复合体系中木粉的分散性以及加入的 PP-g-MAH 显著

改善了体系的相容性，其中PP-g-MAH的增容机理为磨盘碾磨剪切力场作用下

PP-g-MAH与木粉表面羟基发生了力化学酯化接枝反应。

【总页数】8页(P5039-5046)

【作 者】牛志海;陈英红;白时兵

【作者单位】四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都

610065;四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都

610065;四川大学高分子研究所，高分子材料工程国家重点实验室，四川成都

610065

【正文语种】中 文

【中图分类】TQ321.5

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