發(fā)布時(shí)間：2018-06-15 03:50

  本文選題：凹凸棒 + 蒙脫土��； 參考：《上海應(yīng)用技術(shù)學(xué)院》2015年碩士論文

【摘要】：本文利用凹凸棒、蒙脫土及碳納米管等無機(jī)材料制備納米復(fù)合載體,負(fù)載烯烴聚合催化組分得到高性能聚乙烯催化劑,進(jìn)行原位聚合制備納米增強(qiáng)聚乙烯基復(fù)合材料�？疾炝税纪拱�、蒙脫土和碳納米管對乙烯聚合特性的影響,并研究了多維納米材料對聚乙烯基復(fù)合材料的力學(xué)性能、熱性能及結(jié)晶性能的影響。1、利用凹凸棒和氯化鎂制備高活性復(fù)合載體,然后負(fù)載活性組分TiCl4,制備ATP/MgCl2/TiCl4,原位聚合制備聚乙烯／凹凸棒納米復(fù)合材料。當(dāng)ATP:MgCl2=2:1其擁有最大的聚合活性。通過對其動力學(xué)分析發(fā)現(xiàn),其復(fù)合Z-N催化體系。FTIR、拉曼光譜和WAXD分析表明凹凸棒均勻分散在聚乙烯基體中,凹凸棒結(jié)構(gòu)沒有發(fā)生變化,凹凸棒的加入沒有改變聚乙烯的晶型結(jié)構(gòu),凹凸棒對聚乙烯鏈段運(yùn)動的阻礙作用明顯,使PE結(jié)晶生長受阻。SEM, TEM發(fā)現(xiàn)乙烯聚合過程中復(fù)制凹凸棒的棒狀結(jié)構(gòu),凹凸棒以棒晶形態(tài)被聚乙烯鏈包裹著。對復(fù)合材料力學(xué)性能測試發(fā)現(xiàn),當(dāng)納米無機(jī)材料凹凸棒含量為0.0133wt.%時(shí),其復(fù)合材料的屈服強(qiáng)度,拉伸強(qiáng)度,斷裂伸長率,拉伸模量,彎曲強(qiáng)度,沖擊強(qiáng)度比純聚乙烯力學(xué)性能分別增加約5.83%,50%,13.5%,18.75%,12.6%,15%。TGA測試表明當(dāng)凹凸棒在聚乙烯基體中含量為0.0133wt.%時(shí),其材料的最大熱失重溫度比純聚乙烯增加2.5℃。2、通過原位聚合方法制備凹凸棒／蒙脫土納米復(fù)合材料。用FTIR、WAXD、TEM和拉曼光譜對產(chǎn)物結(jié)構(gòu)進(jìn)行表征發(fā)現(xiàn)：凹凸棒和蒙脫土均勻分散在聚乙烯中,凹凸棒的晶型結(jié)構(gòu)沒有發(fā)生變化,而蒙脫土的結(jié)構(gòu)片層被聚乙烯鏈撐開,蒙脫土片層間距增大,發(fā)生剝離,其片層以納米尺寸分散在聚合物中；凹凸棒和蒙脫土的加入影響聚乙烯鏈的運(yùn)動,進(jìn)而對結(jié)晶性能產(chǎn)生影響。SEM發(fā)現(xiàn)乙烯聚合過程中復(fù)制凹凸棒的棒狀結(jié)構(gòu)和蒙脫土的管狀結(jié)構(gòu),凹凸棒和蒙脫土以納米尺寸被聚乙烯鏈包裹著。當(dāng)凹凸棒：蒙脫土=1：1時(shí),納米無機(jī)材料在聚乙烯基體中含量為0.015wt.%時(shí),其材料的屈服強(qiáng)度,拉伸強(qiáng)度,斷裂伸長率,沖擊強(qiáng)度與純聚乙烯相分別比增加了5%,57%,22%,14%,體現(xiàn)出最優(yōu)的力學(xué)性能；聚乙烯／凹凸棒／蒙脫土納米復(fù)合材料的力學(xué)性能相比于單維納米復(fù)合材料和純聚乙烯顯著改善,充分體現(xiàn)多維納米無機(jī)材料的協(xié)同增強(qiáng)作用。TGA測試表明,其與聚乙烯樹脂材料熱穩(wěn)定型相比,復(fù)合材料最大分解速率所對應(yīng)的溫度提高9.56℃。3、以ATP/CNTs/MgCl2/TiCl4為催化體系,原位聚合制備聚乙烯／凹凸棒／蒙脫土納米復(fù)合材料。用FTIR、WAXD、SEM、TEM和拉曼光譜對聚合物結(jié)構(gòu)進(jìn)行表征發(fā)現(xiàn)測試：凹凸棒和碳納米管均勻分散在聚乙烯中,凹凸棒和碳納米管的晶型結(jié)構(gòu)沒有發(fā)生變化,它們以納米尺寸分散在聚乙烯基體中：凹凸棒和碳納米管的加入影響聚乙烯鏈的運(yùn)動,進(jìn)而對其結(jié)晶性能產(chǎn)生影響。SEM發(fā)現(xiàn)乙烯聚合過程中復(fù)制凹凸棒的棒狀結(jié)構(gòu)和碳納米管的管狀結(jié)構(gòu),凹凸棒和碳納米管以納米尺寸被聚乙烯鏈包裹著。通過調(diào)節(jié)凹凸棒和碳納米管制備一系列催化劑,發(fā)現(xiàn)當(dāng)凹凸棒與碳納米管質(zhì)量比為7：1時(shí),催化聚合中無機(jī)材料組分在0.0124wt.%時(shí),力學(xué)性能最優(yōu)；其屈服強(qiáng)度、拉伸強(qiáng)度、斷裂伸長率、沖擊強(qiáng)度相比于純聚乙烯其性能分別增加了2.5%,65%,14.3%,20.2%；相比于聚乙烯/凹凸棒和聚乙烯/碳納米管納米復(fù)合材料其力學(xué)性能有所增加,說明凹凸棒和碳納米管的加入對聚乙烯納米復(fù)合材料有協(xié)同增強(qiáng)作用。TGA分析表明,其與聚乙烯樹脂材料熱穩(wěn)定性相比,當(dāng)納米無機(jī)材料含量在0.01-0.02 wt.%時(shí),最大分解速率所對應(yīng)的溫度提高7.48℃。
[Abstract]:In this paper, the nano composite carrier was prepared by the inorganic materials such as attapulgite, montmorillonite and carbon nanotube, and high performance polyethylene catalyst was obtained by loading olefin polymerization. The effect of attapulgite, montmorillonite and carbon nanotube on the polymerization of ethylene was investigated. The effect of multi-dimensional nanomaterials on the mechanical properties, thermal properties and crystallization properties of polyethylene matrix composites.1, using attapulgite and magnesium chloride to prepare highly active composite carrier, and then load the active component TiCl4, prepare ATP/MgCl2/TiCl4, in situ polymerization to prepare polyethylene / attapulgite nanocomposites. When ATP:MgCl2=2:1 has the largest aggregation. The kinetic analysis shows that the composite Z-N catalytic system.FTIR, Raman spectrum and WAXD analysis show that the attapulgite is uniformly dispersed in the polyethylene matrix, and the structure of the attapulgite has not changed. The attapulgite does not change the crystalline structure of the polyethylene, and the attapulgite has an obvious hindrance to the movement of the polyethylene chain, so that PE The crystal growth is blocked by.SEM, and TEM is found to copy the rod like structure of the attapulgite in the process of ethylene polymerization. The attapulgite is wrapped in the rod crystal form in the polyethylene chain. The mechanical properties of the composite materials are tested. The yield strength, tensile strength, elongation at break and tensile modulus of the composites are found when the content of the nano inorganic material attapulgite is 0.0133wt.%. The flexural strength and impact strength increased by about 5.83%, 50%, 13.5%, 18.75%, 12.6%, respectively. The 15%.TGA test showed that when the attapulgite content in the polyethylene matrix was 0.0133wt.%, the maximum thermal weight loss temperature of the material was 2.5 C.2 higher than that of pure polyethylene, and the attapulgite / montmorillonite nanocomposite was prepared by in-situ polymerization. The structure of the product was characterized by FTIR, WAXD, TEM and Raman spectra. It was found that the attapulgite and montmorillonite were dispersed uniformly in polyethylene. The crystal structure of the attapulgite was not changed, while the structure layer of the montmorillonite was distracted by the polyethylene chain, the interlayer spacing of the montmorillonite was increased, and the layer was dispersed in the nanometer size in the polymer. In addition, the addition of attapulgite and montmorillonite influences the movement of polyethylene chain and the effect on the crystallization performance..SEM found the rod like structure of the attapulgite and the tubular structure of montmorillonite in the process of ethylene polymerization. The attapulgite and montmorillonite are wrapped in the polyethylene chain in nanoscale. When the attapulgite: montmorillonite =1:1, nano inorganic material When the content of the polyethylene matrix is 0.015wt.%, the yield strength, tensile strength, elongation at break and the ratio of impact strength to pure polyethylene are increased by 5%, 57%, 22%, 14%, respectively, and the mechanical properties of polyethylene / attapulgite / montmorillonite nanocomposites are compared with single dimensional nanocomposites and pure materials. Polyethylene significantly improved and fully reflected the synergistic enhancement of multi-dimensional nano inorganic materials..TGA showed that compared with the thermal stability of polyethylene resin, the temperature of the maximum decomposition rate of the composites increased by 9.56.3, with ATP/CNTs/MgCl2/TiCl4 as the catalytic system and in situ polymerization of polyethylene / attapulgite / montmorillonite. FTIR, WAXD, SEM, TEM and Raman spectra were used to characterize the polymer structure. The attapulgite and carbon nanotubes were dispersed uniformly in polyethylene. The crystal structure of the attapulgite and CNTs did not change, and they were dispersed in the polyethylene matrix in nanoscale size: the addition of attapulgite and carbon nanotubes. The motion of the ethylene chain and the effect on its crystalline properties.SEM found that the rod like structure of the attapulgite and the tubular structure of the carbon nanotubes were replicated during the polymerization of ethylene. The attapulgite and carbon nanotubes were wrapped in the polyethylene chain in nanoscale. A series of catalysts were prepared by adjusting the bump and carbon nanotube, and found as the attapulgite and carbon nanotube. When the mass ratio of the rice tube is 7:1, the mechanical properties of the inorganic materials in the catalytic polymerization at 0.0124wt.% are the best, the yield strength, the tensile strength, the elongation at break and the impact strength are 2.5%, 65%, 14.3%, 20.2%, respectively, compared with the properties of pure polyethylene, compared to the polyethylene / Attapulgite and polyethylene / carbon nanotube nanocomposites. The mechanical properties are increased, indicating that the addition of the attapulgite and carbon nanotube has synergistic enhancement on the polyethylene nanocomposites..TGA analysis shows that, compared with the thermal stability of the polyethylene resin, the maximum decomposition rate of the nano inorganic material at 0.01-0.02 wt.% is increased by 7.48.
【學(xué)位授予單位】：上海應(yīng)用技術(shù)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB33

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