白炭黑填充氯化聚乙烯防水卷材的力学性能及填料网络分析
发布时间：2018-11-17 18:54
【摘要】：炭黑是氯化聚乙烯防水卷材的传统补强填料。炭黑填充的氯化聚乙烯防水卷材具有优异的力学性能和耐老化性能，但产品千篇一律全是黑色，暴露防水工程中大量使用很不美观，作为屋顶防水材料时黑色卷材吸热严重，容易造成夏季屋内温度过高。浅色防水卷材是高分子防水卷材的一个重要发展方向，浅色防水卷材的研制具有很强的现实意义。采用浅色填料填充氯化聚乙烯可制得彩色防水卷材。白炭黑具有粒径小、比表面积大的特点，，是首选的弹性体浅色增强填料。白炭黑作为氯化聚乙烯的补强剂，其用量、品种选择、改性剂选用与否都与炭黑有很大差异，因此，对白炭黑填充氯化聚乙烯防水卷材的配方及相应的产品性能进行细致研究很有必要，本论文就是在这样的背景下构思建立的。 本课题旨在对氯化聚乙烯防水卷材的白炭黑增强配方及其加工性能做一系统研究。通过常规力学性能分析、RPA分析、动态机械热分析、红外光谱分析、SEM分析、门尼粘度测试等表征方法首先确定了白炭黑填充氯化聚乙烯的最佳用量，进而对比了不同比表面积白炭黑对氯化聚乙烯力学性能的影响，最后选用多种硅烷偶联剂对氯化聚乙烯/白炭黑复合材料进行改性，筛选出了最佳的偶联剂。研究结果表明：（1）当白炭黑填充量为30phr时，可形成明显的填料网络结构，CPE的综合力学性能最好，拉伸强度可达9MPa,断裂伸长率保持在500%以上。填充量继续增加，CPE卷材的断裂伸长率下降到400%以下，体系门尼粘度偏大，物料流动性变差。（2）白炭黑2填充制品力学性能最好；白炭黑的比表面积越大，材料在低应变下的模量也越高，但各型号白炭黑填充试样在大应变下的模量相近；对比各组分发现，白炭黑2与CPE基体的相互作用最强、3最差；门尼粘度测试结果显示，3号白炭黑填充配方的流动性最好，易于加工，2号最差，1号适中。（3）Si69、A151、KH560均能改善白炭黑在CPE基体中的分散性，降低白炭黑之间的相互作用，提升白炭黑与CPE之间的作用，而KH550改性后增强了白炭黑之间的团聚倾向，胶料的门尼粘度上升。Si69改性后的氯化聚乙烯/白炭黑复合材料动静态力学性能都有显著增强。
[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.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ325.12;TU761.11
本文编号：2338751
[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.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TQ325.12;TU761.11
【引证文献】
相关博士学位论文 前3条
1 林桂;纳米粉体在橡胶基质中的聚集和分散研究[D];北京化工大学;2004年
2 杨建;石墨填充橡胶材料的性能研究及纳米复合材料的制备[D];北京化工大学;2008年
3 张夏丽;聚合物基复合材料中无机组分表面性能反气相色谱研究[D];复旦大学;2008年
本文编号：2338751
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