本文關(guān)鍵詞：玄武巖纖維增強(qiáng)聚丙烯復(fù)合材料力學(xué)性能的研究　出處：《中北大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 玄武巖 聚丙烯 力學(xué)性能 改性

【摘要】：本論文利用環(huán)保材料玄武巖纖維對聚丙烯材料進(jìn)行增強(qiáng)增韌的改性研究,通過對聚丙烯接枝改性引入PP-g-GMA(聚丙烯接枝甲基丙烯酸環(huán)氧丙酯)材料,通過熔融共混乙烯-丙烯-非共軛二烯烴的三元共聚物(EPDM)、丙烯腈-丁二烯-苯乙烯共聚物(ABS)、聚烯烴彈性體(POE)、和甲基丙烯酸甲酯-丁二烯-苯乙烯(MBS)以改善復(fù)合材料的界面性能從而提高其力學(xué)性能,通過力學(xué)實驗、掃描電子顯微鏡、差示掃描量熱儀、X射線衍射及熱重分析實驗等一系列實驗對BF/PP復(fù)合材料及摻入四種彈性體材料進(jìn)行探索實驗,通過實驗分析和計算,研究相容劑和彈性體對聚丙烯改性后的綜合性能進(jìn)行評價,從而使其更好的應(yīng)用在汽車領(lǐng)域。研究結(jié)果如下所示:在玄武巖纖維改性聚丙烯復(fù)合材料中,通過對聚丙烯接枝改性引入PP-g-GMA(聚丙烯接枝甲基丙烯酸環(huán)氧丙酯)材料,以改善復(fù)合材料的界面性能從而提高力學(xué)性能。結(jié)果表明:玄武巖纖維改性聚丙烯復(fù)合材料的力學(xué)性能相比純聚丙烯的力學(xué)性能有很大的提高。隨著纖維BF含量增加,復(fù)合材料的整體力學(xué)性能逐漸增強(qiáng),拉伸屈服強(qiáng)度由38MPa提高到89MPa,尤其是缺口沖擊強(qiáng)度由1.43KJ·m-2提高到4.53KJ·m-2。當(dāng)纖維含量超過30%時,復(fù)合材料力學(xué)性能基本變化較小。通過相容劑PP-g-GMA的加入對復(fù)合材料的改性,能夠使得玄武巖纖維與聚丙烯基體之間具有更好的界面粘結(jié)性,并且復(fù)合材料在承受載荷時,增加吸收外力能力,使得抗沖擊性能顯著提高,實現(xiàn)PP復(fù)合材料的增強(qiáng)。由結(jié)晶動力學(xué)實驗分析可知,不摻雜纖維材料的純聚丙烯的結(jié)晶溫度較高,隨著結(jié)晶溫度提高,結(jié)晶速率提高,兩種模型下動力學(xué)分析(Ozawa方法和Mo模型)計算可得的α值和m值較為恒定,晶體生長方式與成核機(jī)理基本一致。結(jié)晶熔融的行為表現(xiàn)取決于冷卻速率大小。冷卻速率越慢,結(jié)晶的溫度區(qū)域越高,結(jié)晶成核時間越長;冷卻速率越快,結(jié)晶越不完善,溫度會走低。XRD衍射結(jié)果,隨著BF含量的增加,也出現(xiàn)了β峰,但衍射峰的衍射強(qiáng)度很低,說明也只是出現(xiàn)了微量的β晶型,得出結(jié)論相容劑和彈性體的同時加入會對晶型影響較小。
[Abstract]:In this paper, the environmental protection material basalt fiber was used to strengthen and toughen polypropylene materials. PP-g-GMA (polypropylene grafted epoxy propyl methacrylate) was introduced by grafting modification of polypropylene, and the terpolymer EPDM was prepared by melt blending ethylene, propylene and unconjugated diolefin. Acrylonitrile-butadiene-styrene copolymer, polyolefin elastomer (POE). Methyl methacrylate butadiene-styrene (MBS) was used to improve the interfacial properties of the composites and improve their mechanical properties. Through mechanical experiments scanning electron microscopy and differential scanning calorimeter. A series of experiments, such as X-ray diffraction and thermogravimetric analysis, were carried out on BF/PP composites and four kinds of elastomer materials. The comprehensive properties of polypropylene modified by compatibilizer and elastomer were studied, so that it could be better applied in automobile field. The results are as follows: in the polypropylene composites modified by basalt fiber. PP-g-GMA (polypropylene grafted epoxy propyl methacrylate) material was introduced by grafting modification of polypropylene. In order to improve the interfacial properties of the composites and improve the mechanical properties, the results show that:. Compared with pure polypropylene, the mechanical properties of basalt fiber modified polypropylene composites are greatly improved, with the increase of fiber BF content. The overall mechanical properties of the composites were gradually strengthened, and the tensile yield strength increased from 38 MPA to 89 MPA. Especially, the notched impact strength increased from 1.43KJ 路m-2 to 4.53KJ 路m-2.When the fiber content exceeded 30KJ 路m ~ (-2). The mechanical properties of the composites have little change. Through the addition of compatibilizer PP-g-GMA to the composites, the better interfacial adhesion between basalt fiber and polypropylene matrix can be obtained. And when the composite is subjected to load, the ability of absorbing external force is increased, the impact resistance is improved significantly, and the reinforcement of PP composite is realized. The crystallization temperature of pure polypropylene is higher than that of non-doped fiber material, and the crystallization rate increases with the increase of crystallization temperature. Under the two models, the kinetic analysis method and the Mo model are used to calculate the 偽 value and m value, which are relatively constant. The behavior of melting depends on the cooling rate. The slower the cooling rate, the higher the temperature region of crystallization and the longer the nucleation time. The faster the cooling rate, the more imperfect the crystallization, the lower the temperature. XRD diffraction results, with the increase of BF content, there is a 尾 peak, but the diffraction peak diffraction intensity is very low. It is concluded that the addition of compatibilizer and elastomer at the same time has little effect on the crystal form.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ327;TB332

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