聚乙烯醇交联改性对天然纤维增强聚丙烯复合材料性能的影响

发布时间：2018-01-12 23:01

  本文关键词：聚乙烯醇交联改性对天然纤维增强聚丙烯复合材料性能的影响　出处：《复合材料学报》2017年09期 　论文类型：期刊论文

  更多相关文章： 天然纤维 复合材料 PVA交联 力学性能 吸水性能

【摘要】：采用聚乙烯醇(PVA)交联对洋麻(KF)增强聚丙烯(PP)、棕榈(PF)增强聚丙烯(PP)复合材料进行改性,通过模压成型工艺制备KF/PP和PF/PP复合材料。研究不同交联方法对复合材料的结构和性能的影响,采用SEM、DMA等技术研究了改性对复合材料的界面结合及力学性能影响。结果表明:PVA协同偶联剂交联改性对天然纤维/PP复合材料的综合改性效果最好,当用5%PVA+3%偶联剂对KF/PP改性时,KF/PP复合材料的弯曲强度提升25.2%,弯曲模量提升35.49%,剪切强度提升28%,分别达到了50.90 MPa、5.76 GPa、5.4MPa。当用5%PVA+2%偶联剂对PF/PP改性时,PF/PP复合材料的弯曲强度提升31.46%,弯曲模量提升27.07%,剪切强度提升21.75%,分别达到44.33MPa、2.32GPa、5.18MPa。改性后KF/PP、PF/PP复合材料的含水率分别下降了46.89%、10.63%,吸水率分别下降了8.57%、6.12%。KF/PP改性后储能模量提高20.93%,PF/PP改性后Tg值由90.1℃上升到113.8℃。SEM表明:PVA协同偶联剂交联改性有效改善了纤维与PP间的粘结,纤维与PP间的界面结合得到改善。
[Abstract]:Polyvinyl alcohol (PVA) crosslinking was used to modify PP / PP / KF / PP / PP / PP / PP / PP / PP / PP composites. KF/PP and PF/PP composites were prepared by moulding process. The effects of different crosslinking methods on the structure and properties of the composites were studied. SEM was used. The effects of the modification on the interfacial bonding and mechanical properties of the composites were studied by DMA and other techniques. The results showed that the composite modification of natural fiber / PP composites with the coordination of the coupling agent was the best. The bending strength of KF / PP composites was increased by 25.2and the flexural modulus was increased by 35.49and the shear strength was increased by 28% when the KF/PP was modified with 5PVA 3% coupling agent. The PF/PP was modified with 50.90 GPA 5.76GPa5.4MPa. when the coupling agent 5PVA 2% was used to modify PF/PP. The bending strength of PF/PP composites increased 31.46%, the flexural modulus increased 27.07%, and the shear strength increased 21.75 GPA, respectively, reaching 44.33 MPA / 2.32 GPA. The moisture content of modified KF / PP / PP / PP / PP composites decreased by 46.89% and 10.63 respectively, and the water absorption rate decreased by 8.57% respectively. The storage modulus of 6.12. KF / PP was increased by 20.93%. The TG value of PF/PP was increased from 90.1 鈩，

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