有机支架结构对丁苯橡胶/乙烯-醋酸乙烯共聚物复合发泡材料性能的影响  

Effect of organic scaffold structure on properties of styrene butadiene rubber/ethylene vinyl acetate composite foams

作　　者：姬占有 马建中 王慧迪 马忠雷 邵亮[3] JI Zhanyou;MA Jianzhong;WANG Huidi;MA Zhonglei;SHAO Liang(College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China;School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China;College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,西安710021 [2]陕西科技大学材料科学与工程学院,西安710021 [3]陕西科技大学化学与化工学院,西安710021 [4]陕西科技大学轻化工程国家级实验教学示范中心,西安710021

出　　处：《复合材料学报》2021年第7期2123-2131,共9页Acta Materiae Compositae Sinica

基　　金：咸阳市重大科技专项计划(2018k01-46);西安市科技计划项目(2019216514GXRC001CG002-GXYD1.2);陕西省教育厅服务地方专项计划项目(19JC003)。

摘　　要：为提高橡胶发泡材料尺寸稳定性及实现其广泛的工业化应用,基于硫磺和过氧化二异丙苯的交联体系,通过机械共混的方式,以具有结晶性的乙烯-醋酸乙烯共聚物(EVA)构筑有机支架结构,制备了高尺寸稳定性的丁苯橡胶(SBR)/EVA复合发泡材料。研究了不同醋酸乙烯(VA)含量的EVA对SBR/EVA复合材料结晶性、相容性、泡孔形貌、尺寸稳定性和力学性能的影响规律,并探明了EVA结晶区作为有机支架结构的抗收缩机制。结果表明:不同VA含量EVA的SBR/EVA复合材料都具有良好的发泡行为。高结晶度的EVA(VA含量为18%)使SBR/EVA复合发泡材料的收缩率减小至4.7%,硬度和压缩强度(60%)分别增加到70 Shore C和22 MPa。In order to improve the dimensional stability of the rubber-based foam material and realize its wide industrialization,an organic scaffold structure was constructed with crystalline ethylene vinyl acetate copolymer(EVA)to enhance the dimensional stability of styrene butadiene rubber(SBR)/EVA composite foam based on the cross-linked structure of sulfur and dicumyl peroxide through mechanical blending.The effects of different content of vinyl ester(VA)content on the crystallinity,compatibility,cell morphology,dimensional stability and mechanical properties of SBR/EVA composites were studied,and the anti-shrinkage mechanism of the EVA crystal area as an organic scaffold structure was explored.The results show that SBR/EVA composites with different VA content of EVA have good foaming behavior.The shrinkage of SBR/EVA composite foam with high crystallinity EVA(18%VA content)is reduced to 4.7%and its hardness and compression stress(60%)are increased to 70 Shore C and 22 MPa,respectively.

关 键 词：橡胶发泡 有机支架结构 结晶性 尺寸稳定性 力学性能 

分 类 号：TB324[一般工业技术—材料科学与工程]