杜仲橡胶-丁苯橡胶复合体系的共硫化及其动静态力学性能  

Co-vulcanization of eucommia ulmoides gum-styrene butadiene rubber composite system and its dynamic and static mechanical properties

作　　者：邓琳僡 殷德贤 向万坤 孙泉 丁晓冬 赵秀英[1] DENG Linhui;YIN Dexian;XIANG Wankun;SUN Quan;DING Xiaodong;ZHAO Xiuying(Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials,Beijing University of Chemical Technology,Beijing 100029,China;Systems Engineering Research Institute of China State Shipbuilding Cooperation,Beijing 100094,China)

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029 [2]中国船舶工业系统工程研究院,北京100094

出　　处：《复合材料学报》2022年第12期5892-5900,共9页Acta Materiae Compositae Sinica

基　　金：国家重点研发计划项目(2017YFB0306904)。

摘　　要：将杜仲橡胶(EUG)与丁苯橡胶(SBR)共混,制备了EUG-SBR橡胶复合材料。通过剥离实验和拉伸实验表征其共硫化的情况;通过拉伸实验,SEM、DMA和XRD研究了EUG含量对复合材料动静态性能的影响。结果表明,硫化体系:促进剂N,N-二环己基-2-苯并噻唑磺酰胺(DZ)的质量比为1.0%(以EUG-SBR的质量为基准,下同)、促进剂二硫化四甲基秋兰姆(TMTD)0.1%、硫磺1.5%可以使两种橡胶达到更好的共硫化,剥离强度达到4.2 kN/m,EUG-SBR(EUG∶SBR质量比为70∶30)复合材料的拉伸强度达到6.3 MPa。复合材料中的EUG晶区主要以β晶型存在,随着EUG含量增多,复合材料的结晶度和熔融温度明显提高。EUG相的引入会使复合材料的损耗因子峰值tanδ_(max)下降,同时大幅提高复合材料的储能模量,在10℃时EUG-SBR复合材料的储能模量会从质量比5%EUG时的3.0×10^(6) Pa提高到35%EUG时的1.7×10^(7) Pa。同时晶区的存在起到物理交联点的作用,提升复合材料的拉伸强度和定伸应力。Eucommia ulmoides gum(EUG)was blended with styrene butadiene rubber(SBR)to prepare EUG-SBR composites.The co-vulcanization was characterized by stripping experiments and tensile experiments,and the effect of EUG content on the dynamic properties of the composites was studied via tensile experiment,SEM,DMA and XRD.The results display that the prepared sulfide formula(mass ratio of accelerant N,N-dicyclohexyl-2-benzothiazole sulfonamide(DZ)1.0%(based on the mass of EUG-SBR),accelerant tetramethylthiuram disulfide(TMTD)0.1%,sulfur 1.5%)could achieve better co-vulcanization of the two rubbers.The stripping strength of the two rubbers reaches 4.2 kN/m and the tensile strength(mass ratio of SBR∶EUG=70∶30)could reach 6.3 MPa.The EUG phase in the composites mainly exists inβ-crystalline form,and with the EUG content increasing,the crystallinity and melt temperature of the composites are significantly improved.The introduction of EUG decreases the peak loss factor tanδ_(max) value and increases the storage modulus of the composites.At temperatures of 10℃,the storage modulus of EUG-SBR composites increases from 3.0×10^(6) Pa(with 5%mass of EUG)to 1.7×10^(7) Pa(with EUG of 35%).At the same time,the presence of crystal zone plays a role of physical crosslinking points to improve the tensile strength and fixed elongation stress of composites.

关 键 词：杜仲橡胶 丁苯橡胶 共硫化 阻尼 模量 晶体 渝渗 

分 类 号：TB332[一般工业技术—材料科学与工程]