反式丁戊橡胶改性航空轮胎侧胶的结构与性能  

Structure and Properties of Sidewall Compounds for Aircraft Tyre Modified by TBIR

作　　者：张跃发 邵华锋[1] 王日国 贺爱华[1] ZHANG Yuefa;SHAO Huafeng;WANG Riguo;HE Aihua(Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization,Key Laboratory of Rubber-plastics(Ministry of Education),School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;Shandong Huaju Polymer Material Co.,Ltd.,Binzhou 256500,China)

机构地区：[1]山东省烯烃催化与聚合重点实验室,橡塑材料与工程教育部重点实验室,青岛科技大学高分子科学与工程学院,青岛266042 [2]山东华聚高分子材料有限公司,滨州256500

出　　处：《高等学校化学学报》2019年第8期1733-1739,共7页Chemical Journal of Chinese Universities

基　　金：国家“九七三”计划项目(批准号:2015CB654700,2015CB654706);山东省重大基础研究项目(批准号:ZR2017ZA0304);泰山学者工程资助~~

摘　　要：采用反式-1,4-丁二烯-异戊二烯共聚橡胶(简称反式丁戊橡胶,TBIR)改性航空轮胎侧胶[天然橡胶(NR)/顺丁橡胶(BR)(质量比80/20)],研究了NR/BR/TBIR混炼胶的结晶行为、力学性能、硫化特性及硫化胶的物理机械性能、动态力学性能和填料分散性.结果表明,相比NR/BR并用胶,结晶性TBIR的并用赋予NR/BR/TBIR混炼胶较高的格林强度和杨氏模量.NR/BR/TBIR混炼胶工艺正硫化时间延长,交联密度提高.TBIR用量范围内,NR/BR/TBIR硫化胶300%定伸应力提高7%,耐屈挠疲劳性能提高35%~50%,滚动阻力降低.m(NR)/m(BR)/m(TBIR)为80/10/10硫化胶具有更好的综合力学性能及耐热氧老化性能.随着硫化时间的延长,NR/BR/TBIR(80/10/10)硫化胶较NR/BR(80/20)硫化胶100%定伸应力提高18%以上,NR/BR体系的耐屈挠疲劳性降低近60%,而NR/BR/TBIR(80/10/10)体系仍能保持原来的50%;反映滚动阻力的60℃损耗因子降低8%~14%,反映抗湿滑性的0℃损耗因子保持不变.填料分散度得到改善,填料聚集体尺寸降低.NR/BR/TBIR(80/10/10)硫化胶具有更好的耐长时间硫化的特性.Trans -1,4-poly(butadiene-co-isoprene) copolymer rubber(TBIR) was used to modify nature rubber(NR)/butadiene rubber(BR) blends for sidewall compounds in aircraft tyre, and the crystalline behavior, mechanical properties and vulcanization characteristics of the NR/BR/TBIR compounds, physical and mechanical properties, dynamic mechanical properties and filler dispersion of the NR/BR/TBIR vulcanizates were studied in details. The results indicate that the incorporation of crystalline TBIR endows the NR/BR/TBIR compounds higher green strength and Young’s modulus. Blending TBIR with NR/BR, the optimum curing time( t c90 ) and the crosslinking density of the compounds increased. The NR/BR/TBIR[ m (NR)/ m (BR)/ m (TBIR)=80/10/10, 80/0/20] vulcanizates with TBIR incorporation showed 7% higher of 300% modulus, 35%―50% higher of flexural fatigue resistance and reduced rolling resistance compared with NR/BR vulcanizate. NR/BR/TBIR(80/10/10) vulcanizate presented better comprehensive properties with improved thermo-oxidative ageing resistance. With the extension of curing time, modulus at 100% of NR/BR/TBIR(80/10/10) vulcanizate was above 18% higher than NR/BR(80/20) vulcanizate. Flexural fatigue resistance of NR/BR vulcanizate was reduced by 60%, while only 50% of NR/BR/TBIR(80/10/10) vulcanizate. The NR/BR/TBIR vulcanizate showed reduced rolling resistance(8%-14% lower) and unchanged wet skid resistance. The filler dispersion improved with reduced filler aggregate size. NR/BR/TBIR(80/10/10) vulcanizate had good resistance to the longer curing time.

关 键 词：反式丁二烯-异戊二烯共聚橡胶 耐疲劳性能 生热性能 航空轮胎侧胶 

分 类 号：O631[理学—高分子化学]