本文關(guān)鍵詞：聚乙烯醇交聯(lián)改性對(duì)天然纖維增強(qiáng)聚丙烯復(fù)合材料性能的影響　出處：《復(fù)合材料學(xué)報(bào)》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 天然纖維 復(fù)合材料 PVA交聯(lián) 力學(xué)性能 吸水性能

【摘要】：采用聚乙烯醇(PVA)交聯(lián)對(duì)洋麻(KF)增強(qiáng)聚丙烯(PP)、棕櫚(PF)增強(qiáng)聚丙烯(PP)復(fù)合材料進(jìn)行改性,通過(guò)模壓成型工藝制備KF/PP和PF/PP復(fù)合材料。研究不同交聯(lián)方法對(duì)復(fù)合材料的結(jié)構(gòu)和性能的影響,采用SEM、DMA等技術(shù)研究了改性對(duì)復(fù)合材料的界面結(jié)合及力學(xué)性能影響。結(jié)果表明:PVA協(xié)同偶聯(lián)劑交聯(lián)改性對(duì)天然纖維/PP復(fù)合材料的綜合改性效果最好,當(dāng)用5%PVA+3%偶聯(lián)劑對(duì)KF/PP改性時(shí),KF/PP復(fù)合材料的彎曲強(qiáng)度提升25.2%,彎曲模量提升35.49%,剪切強(qiáng)度提升28%,分別達(dá)到了50.90 MPa、5.76 GPa、5.4MPa。當(dāng)用5%PVA+2%偶聯(lián)劑對(duì)PF/PP改性時(shí),PF/PP復(fù)合材料的彎曲強(qiáng)度提升31.46%,彎曲模量提升27.07%,剪切強(qiáng)度提升21.75%,分別達(dá)到44.33MPa、2.32GPa、5.18MPa。改性后KF/PP、PF/PP復(fù)合材料的含水率分別下降了46.89%、10.63%,吸水率分別下降了8.57%、6.12%。KF/PP改性后儲(chǔ)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協(xié)同偶聯(lián)劑交聯(lián)改性有效改善了纖維與PP間的粘結(jié),纖維與PP間的界面結(jié)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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