不同抗氧剂对反式-1,4-丁二烯-异戊二烯共聚橡胶及其复合材料性能的影响  

Effect of different antioxidants on properties of trans-1,4-butadiene-isoprene rubber and its composites

作　　者：宗鑫 高波 李兰阁 葛怀涛 李丹丹 ZONG Xin;GAO Bo;LI Lan-ge;GE Huai-tao;LI Dan-dan(Shandong Huaju Polymer Material Co Ltd,Binzhou 256500,China;Chambroad Chemical Industry Research Institute Co Ltd,Binzhou 256500,China)

机构地区：[1]山东华聚高分子材料有限公司,山东滨州256500 [2]黄河三角洲京博化工研究院有限公司,山东滨州256500

出　　处：《合成橡胶工业》2024年第6期485-490,共6页China Synthetic Rubber Industry

基　　金：国家重点研发计划项目(SQ 2022 YFB 3700063);山东省重大科技创新工程项目(2021 CXGC 010901)。

摘　　要：研究了3种抗氧剂对反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)生胶耐老化性能、天然橡胶(NR)/TBIR混炼胶硫化特性和NR/TBIR硫化胶物理机械性能及耐屈挠疲劳性能的影响。结果表明,不同种类抗氧剂对TBIR生胶和NR/TBIR复合材料的防老化效果不同。含有不同抗氧剂的TBIR生胶的氧化诱导温度和氧化诱导时间不同,其中含有受阻酚类、对苯二胺类和亚磷酸酯类复合抗氧剂的TBIR生胶的氧化诱导温度最高、氧化诱导时间最长,其耐热氧老化性能最好。相较于NR混炼胶,不同NR/TBIR混炼胶的最小转矩均有不同程度的增大,焦烧时间延长,正硫化时间缩短,硫化速率加快,其中含有复合抗氧剂混炼胶的硫化速率较其他混炼胶更快。抗氧剂种类对NR/TBIR硫化胶的物理机械性能和常温耐屈挠疲劳性能无显著影响;相较于NR硫化胶,NR/TBIR硫化胶的拉伸强度、定伸应力和扯断伸长率均略降低,耐磨性能均显著提高,而滚动阻力则均显著降低;相较于NR硫化胶,除含有受阻酚类抗氧剂的NR/TBIR硫化胶外,其他硫化胶的老化系数均减小;相较于NR硫化胶,NR/TBIR硫化胶的常温疲劳寿命均显著延长,90℃时的高温疲劳寿命有不同程度的延长,其中仅含有受阻酚类抗氧剂硫化胶的疲劳寿命最长;100℃老化48 h后仅含有受阻酚类抗氧剂NR/TBIR硫化胶的六级疲劳寿命显著延长,而其他NR/TBIR硫化胶和NR硫化胶疲劳寿命基本保持不变。综合而言,受阻酚类抗氧剂对NR/TBIR硫化胶具有较好的热氧老化防护作用。The effects of three antioxidants on aging properties of raw trans-1,4-poly(butadiene-co-isoprene)copolymer rubber(TBIR),curing characteristics of natural rubber(NR)/TBIR rubber compounds,and physical and mechanical properties and flexural fatigue resistance of NR/TBIR vulcanizates were studied.The results showed that different types of antioxidants had different anti-aging effects on raw TBIR and NR/TBIR composites.The oxidation induction temperature and oxidation induction time of raw TBIR containing different antioxidants were different,and the oxidation induction temperature was the highest of raw TBIR containing hindered phenolic,p-phenylenediamine and phosphite composite antioxidant and the oxidation induction time was the longest,and the thermal-oxidative aging resistance was the best.Compared with NR compound,the minimum torque of different NR/TBIR compounds all increased to varying degrees,the scorch time were prolonged,the vulcanization time were shor-tened and the vulcanization rate were accelerated,and the vulcanization rate of the compound contai-ning composite antioxidant was faster than that of the other NR/TBIR compounds.The types of antioxidants had no significant effect on the physical and mechanical properties and room-temperature flexural fatigue resistance of NR/TBIR vulcanizates.Compared with the NR vulcanizate,the tensile strength,modulus,and elongation at break of the NR/TBIR vulcanizates were slightly lower,the abrasion resistance was significantly improved,while the rolling resistance was significantly reduced;compared with NR vulcanizate,except for NR/TBIR vulcanizate containing hindered phenolic antioxidant,the aging coefficients of the other vulcanizates all reduced;compared with NR vulcanizate,the room temperature fatigue life of NR/TBIR vulcanizates were significantly prolonged and the high-temperature fatigue life at 90℃all extended to varying degrees,and the vulcanizate containing only hindered phenolic antioxidant had the longest fatigue life;after aging at 100℃for 48 h,the g

关 键 词：抗氧剂 反式-1 4-丁二烯-异戊二烯共聚橡胶 天然橡胶 复合材料 物理机械性能 耐老化性能 耐屈挠疲劳性能 

分 类 号：TQ333.99[化学工程—橡胶工业]