自粘型聚硼硅氧烷复合材料性能  

Properties of self-adhesive polyborosiloxane composite

作　　者：商旭静 薛志博 沈尔明 王刚 滕佰秋 朱崇伟 SHANG Xujing;XUE Zhibo;SHEN Erming;WANG Gang;TENG Baiqiu;ZHU Chongwei(Manufacturing Engineering Technology Department,Shenyang Engine Design Institute,Shenyang 110015,China)

机构地区：[1]沈阳发动机研究所制造工程技术研究室,沈阳110015

出　　处：《航空材料学报》2023年第4期122-128,共7页Journal of Aeronautical Materials

摘　　要：聚硼硅氧烷属于超分子材料,材料本身具备物理交联网络结构,具有耐高低温、耐候、电绝缘、自修复等特性,但现有方法制备的聚硼硅氧烷材料力学性能差,限制了其在一些领域的应用。本工作采用高分子量聚甲基乙烯基硅氧烷(VMQ)与硼酸(BA)在高温环境下反应,制备一种含乙烯基的聚硼硅氧烷,通过引入乙烯基结构和气相法白炭黑,经热硫化处理,得到具有表面自粘性的聚硼硅氧烷复合材料。测定聚硼硅氧烷复合材料的结构、动态力学性能、热稳定性、力学性能以及自粘性能,通过红外反射光谱确认B-O-Si结构。结果表明:聚硼硅氧烷复合材料的内部形成了B∶O动态键,材料表面具有一定的自粘性能,自粘形成的剥离强度能达到4 N/cm,拉伸强度可达4.154 MPa,5%热失重温度为394.8℃,具有良好的力学性能和热稳定性。Polyborosiloxane(PBS)is a supramolecular material,the material itself has a physical cross-linked network structure,and has the characteristics of high and low temperature resistance,weather resistance,electrical insulation and self-healing.However,the mechanical properties of polyborosiloxane material prepared by existing methods are poor,which limits its application in some fields.In order to improve the mechanical properties of polyborosiloxane and broaden the application field of the material,in this paper,a vinyl-containing polyborosiloxane was prepared by reacting high-molecular-weight polymethylvinylsiloxane(VMQ)with boric acid(BA)at high temperature.The polyborosiloxane composite material with surface self-adhesiveness was obtained by introducing vinyl structure and fumed white carbon black and undergoing thermal vulcanization treatment.The structure,dynamic mechanical properties,thermal stability,mechanical properties and self-adhesive properties of polyborosiloxane composite were measured,and the formation of B—O—Si structure was confirmed by infrared reflection spectroscopy.The results show that the B∶O dynamic bond is formed inside the polyborosiloxane composite material,and the surface of the material has certain selfadhesive properties.The peel strength formed by self-adhesion can reach 4 N/cm,the tensile strength is 4.154 MPa,and 5%thermal mass loss temperature is 394.8°C,which means that the sample has good mechanical properties and thermal stability.

关 键 词：聚硼硅氧烷复合材料 损耗因子 力学性能 自粘性 

分 类 号：TQ333[化学工程—橡胶工业]