高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (6): 1334.doi: 10.7503/cjcu20170676

• 高分子化学 • 上一篇    下一篇

TBIR改性BIIR/NR共混物的结构与性能

张剑平1, 宋丽媛1, 王浩3, 王日国2, 贺爱华1()   

  1. 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
    3. 山东省烯烃催化与聚合重点实验室, 黄河三角洲京博化工研究院有限公司, 滨州 256500
  • 收稿日期:2017-10-13 出版日期:2018-06-10 发布日期:2018-03-20
  • 基金资助:
    国家重点基础研究发展计划项目[批准号: 2015CB654700(2015CB654706)]、 国家自然科学基金(批准号: 51473083)、 泰山学者工程、 山东省重大基础研究项目(批准号: ZR2017ZA0304)、 山东省重点项目研发计划项目(批准号: 2015GGX102019)和黄河三角洲学者工程资助.

Structure and Properties of Brominated Butyl Rubber/Nature Rubber(BIIR/NR) Blends Modified with TBIR

ZHANG Jianping1, SONG Liyuan1, WANG Hao3, WANG Riguo2, HE Aihua1,*()   

  1. 1. 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
    2. Shandong Huaju Polymer Material Co., Ltd., Binzhou 256500, China
    3. Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Chambroad ChemicalIndustry Institute Co., Ltd., Binzhou 256500, China
  • Received:2017-10-13 Online:2018-06-10 Published:2018-03-20
  • Contact: HE Aihua E-mail:aihuahe@iccas.ac.cn
  • Supported by:
    † Supported by the National Basic Research Program of China[No.2015CB654700(2015CB654706)], the National Natural Science Foundation of China(No.51473080), the Taishan Scholar Program, China, the Significant Basic Research Program of Shandong Province, China(No.ZR2017ZA0304) and the Yellow River Delta Scholar Program, China.

摘要:

研究了新型合成橡胶——高反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)对全钢轮胎气密层并用橡胶——溴化丁基橡胶(BIIR)/天然橡胶(NR)(质量比70/30)的改性作用, 探讨了BIIR/NR/TBIR共混物的交联密度、 填料分散性及力学性能, 特别是并用硫化胶的气密性及屈挠疲劳性能等. 结果表明, 与无定型的BIIR和NR相比, 结晶性TBIR的引入提高了炭黑填充的BIIR/NR/TBIR混炼胶的强度和模量, 且随着TBIR用量的增大, 混炼胶中TBIR的结晶熔融峰更明显, 混炼胶的强度与模量显著提高. 硫化特性结果表明, 随着TBIR用量的增大, BIIR/NR/TBIR共混物的硫化速率略有提高, 交联密度略有降低; TBIR用量为10~30份(生胶总质量的10%~30%)时, BIIR/NR/TBIR硫化胶在机械性能基本保持不变的情况下, 耐热氧老化性能提高10%以上, 耐一级屈挠疲劳性能提升2~5倍, 气密性提高17%. 炭黑分散结果表明, 经过动态疲劳实验BIIR/NR硫化胶中炭黑聚集体的平均粒径增大至11.5 μm, 明显大于BIIR/NR/TBIR硫化胶中炭黑聚集体的平均粒径. 对含TBIR硫化胶在周期性应力应变过程中的结构演变及对耐疲劳裂纹引发性能的影响机制进行了探讨, 结果表明, TBIR可改性BIIR或者BIIR/NR制备高抗裂口引发的全钢轮胎气密层材料.

关键词: 反式-1,4-丁二烯-异戊二烯共聚橡胶, 气密层, 气密性, 动态疲劳性能, 老化性能, 溴化丁基橡胶, 天然橡胶

Abstract:

As a new generation of synthetic rubber, trans-1,4-poly(butadiene-co-isoprene) copolymer rubber(TBIR) was used to modify brominated butyl rubber(BIIR)/ nature rubber(NR) blends for high performance inner liner stocks in all steel radial truck tire, and the crosslinking density, filler dispersion, physical and mechanical properties including gas permeability and flexual fatigue resistance of the BIIR/NR/TBIR blends after crosslinking were studied in details. The results indicate that the carbon black filled BIIR/NR/TBIR compounds show increased green strength and modulus with increased TBIR content, and DSC curves prove the crystallizability of TBIR component in the compounds and the crystallization peaks from TBIR can still be detected in the BIIR/NR/TBIR vulcanizates. Blending TBIR with BIIR/NR, the optimum curing time(t90) and the crosslinking density of the compounds slightly reduced. The BIIR/NR/TBIR vulcanizates showed excellent properties, such as improved hot-air aging resistance(10% higher) and air barrier resistance(17% higher), and greatly improved the 1st-class crack resistance(2 to 5 times higher). The mean size of the carbon black aggregates in BIIR/NR vulcanizate after fatigue test became larger than that in BIIR/NR/TBIR vulcanizates. Finally, the structure evaluation of the BIIR/NR/TBIR vulcanizates and its influences in the crack initiation resistance during the dynamic process with periodical stress and strain were discussed in details. TBIR is deemed as an ideal candidate to modify BIIR or BIIR/NR blends for truck tire inner liner stocks with higher crack initiation resistance without deteriorating of other properties.

Key words: Trans-1,4-poly(butadiene-co-isoprene) copolymer rubber, Inner liner, Gas barrier, Flex fatigue property, Aging, Brominated butyl rubber, Nature rubber

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