【摘要】：炭黑是氯化聚乙烯防水卷材的傳統(tǒng)補強填料。炭黑填充的氯化聚乙烯防水卷材具有優(yōu)異的力學性能和耐老化性能，但產品千篇一律全是黑色，暴露防水工程中大量使用很不美觀，作為屋頂防水材料時黑色卷材吸熱嚴重，容易造成夏季屋內溫度過高。淺色防水卷材是高分子防水卷材的一個重要發(fā)展方向，淺色防水卷材的研制具有很強的現(xiàn)實意義。采用淺色填料填充氯化聚乙烯可制得彩色防水卷材。白炭黑具有粒徑小、比表面積大的特點，，是首選的彈性體淺色增強填料。白炭黑作為氯化聚乙烯的補強劑，其用量、品種選擇、改性劑選用與否都與炭黑有很大差異，因此，對白炭黑填充氯化聚乙烯防水卷材的配方及相應的產品性能進行細致研究很有必要，本論文就是在這樣的背景下構思建立的。 本課題旨在對氯化聚乙烯防水卷材的白炭黑增強配方及其加工性能做一系統(tǒng)研究。通過常規(guī)力學性能分析、RPA分析、動態(tài)機械熱分析、紅外光譜分析、SEM分析、門尼粘度測試等表征方法首先確定了白炭黑填充氯化聚乙烯的最佳用量，進而對比了不同比表面積白炭黑對氯化聚乙烯力學性能的影響，最后選用多種硅烷偶聯(lián)劑對氯化聚乙烯/白炭黑復合材料進行改性，篩選出了最佳的偶聯(lián)劑。研究結果表明：（1）當白炭黑填充量為30phr時，可形成明顯的填料網(wǎng)絡結構，CPE的綜合力學性能最好，拉伸強度可達9MPa,斷裂伸長率保持在500%以上。填充量繼續(xù)增加，CPE卷材的斷裂伸長率下降到400%以下，體系門尼粘度偏大，物料流動性變差。（2）白炭黑2填充制品力學性能最好；白炭黑的比表面積越大，材料在低應變下的模量也越高，但各型號白炭黑填充試樣在大應變下的模量相近；對比各組分發(fā)現(xiàn)，白炭黑2與CPE基體的相互作用最強、3最差；門尼粘度測試結果顯示，3號白炭黑填充配方的流動性最好，易于加工，2號最差，1號適中。（3）Si69、A151、KH560均能改善白炭黑在CPE基體中的分散性，降低白炭黑之間的相互作用，提升白炭黑與CPE之間的作用，而KH550改性后增強了白炭黑之間的團聚傾向，膠料的門尼粘度上升。Si69改性后的氯化聚乙烯/白炭黑復合材料動靜態(tài)力學性能都有顯著增強。
[Abstract]:Carbon black is a traditional reinforcing filler for chlorinated polyethylene waterproof membrane. The chlorinated polyethylene waterproofing membrane filled with carbon black has excellent mechanical properties and aging resistance, but the products are all black, so they are widely used in exposed waterproofing projects. When used as roof waterproof materials, the black coils absorb heat seriously. It is easy to cause excessive temperature in the house in summer. Light color waterproof membrane is an important development direction of polymer waterproof membrane, and the development of light color waterproof membrane is of great practical significance. Color waterproof roll can be made by filling chlorinated polyethylene with light color filler. Silica with small particle size and large specific surface area is the preferred light-color filler for elastomer. As the reinforcing agent of chlorinated polyethylene, the amount of silica, the selection of varieties and the choice of modifier are very different from those of carbon black. It is necessary to study the formulation and properties of chlorinated polyethylene (CPE) waterproof membrane filled with silica. This paper is based on this background. The purpose of this paper is to make a systematic study on the silica reinforcing formula and processing performance of chlorinated polyethylene waterproofing roll. The optimum content of chlorinated polyethylene filled with silica was determined by conventional mechanical property analysis, RPA analysis, dynamic mechanical thermal analysis, infrared spectrum analysis, SEM analysis and Mooney viscosity test. The influence of silica with different specific surface area on the mechanical properties of chlorinated polyethylene (CPPE) was compared. Finally, a variety of silane coupling agents were selected to modify CPE / silica composite, and the best coupling agent was selected. The results show that: (1) when the content of silica is 30phr, the obvious filler network structure can be formed. The comprehensive mechanical properties of CPE are the best, the tensile strength is up to 9 MPA, and the elongation at break is over 500%. With the increase of filling amount, the elongation at break of CPE coils decreased to less than 400%, the Mooney viscosity of the system was larger and the material fluidity became worse. (2) the mechanical properties of the filled products of silica 2 were the best; The larger the specific surface area of silica is, the higher the modulus of the material is at low strain, but the modulus of each type of silica filled sample is similar at large strain, and the comparison shows that the interaction between silica 2 and CPE matrix is the strongest and the third is the worst. Mooney viscosity test showed that No.3 silica filled formula had the best fluidity, easy to process, No.2 the worst, and No.1 moderate. (3) Si69,A151,KH560 could improve the dispersion of silica in CPE matrix. The interaction between silica was reduced and the interaction between silica and CPE was enhanced, while the agglomeration tendency of silica was enhanced after modification of KH550. The Mooney viscosity of the compound increased and the dynamic and static mechanical properties of CPE / silica composites modified by Si69 were significantly enhanced.
【學位授予單位】：北京化工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TQ325.12;TU761.11

【引證文獻】

相關博士學位論文 前3條

1 林桂;納米粉體在橡膠基質中的聚集和分散研究[D];北京化工大學;2004年

2 楊建;石墨填充橡膠材料的性能研究及納米復合材料的制備[D];北京化工大學;2008年

3 張夏麗;聚合物基復合材料中無機組分表面性能反氣相色譜研究[D];復旦大學;2008年

本文編號：2338751