高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (8): 20230023.doi: 10.7503/cjcu20230023

• 高分子化学 • 上一篇    下一篇

TBIR对天然橡胶纳米复合材料结构和性能的调控

钱浙濠, 王硕, 宗鑫, 蔡磊, 贺爱华()   

  1. 青岛科技大学高分子科学与工程学院,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 266042
  • 收稿日期:2023-01-15 出版日期:2023-08-10 发布日期:2023-05-25
  • 通讯作者: 贺爱华 E-mail:ahhe@qust.edu.cn
  • 作者简介:第一联系人:共同第一作者.
  • 基金资助:
    国家重点研发计划项目(2022YFB3704700);山东省重大科技创新工程项目(2021CXGC010901);泰山学者工程专项经费资助

Regulation of TBIR on the Structure and Properties of Natural Rubber Based Nanocomposites

QIAN Zhehao, WANG Shuo, ZONG Xin, CAI Lei, HE Aihua()   

  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
  • Received:2023-01-15 Online:2023-08-10 Published:2023-05-25
  • Contact: HE Aihua E-mail:ahhe@qust.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2022YFB3704700);the Major Scientific and Technological Innovation Project of Shandong Province, China(2021CXGC010901);the Taishan Scholar Program, Special Fund, China

摘要:

利用天然橡胶湿法胶(W-NR)与天然橡胶(NR)制备了NR/W-NR混炼胶, 并进一步利用反式-1,4-丁二烯-异戊二烯共聚橡胶(TBIR)改性NR及NR/W-NR, 构筑具有不同聚合物网络结构及填料网络结构的橡胶纳米复合材料. 采用炭黑填料分散仪、 差示扫描量热仪以及平衡溶胀法等研究了白炭黑填充NR和NR/W-NR, NR/TBIR及NR/W-NR/TBIR橡胶纳米复合材料的结构与性能. 结果表明, 与NR和NR/W-NR相比, TBIR的加入可在天然橡胶基体中构筑聚合物双网络结构(包括硫交联键和TBIR片晶物理交联点), 提高了混炼胶的模量与格林强度, 改善了填料分散性, 进而提高填料-橡胶相互作用. 分别相对于NR和NR/W-NR硫化胶, NR/TBIR(90/10)及NR/W-NR/TBIR(40/66.5/10)硫化胶的耐磨性及伸张疲劳性能提高, 滚动阻力降低, 耐老化性改善. 其中, TBIR与湿法胶并用构筑的NR/W-NR/TBIR(40/66.5/10)硫化胶具有更低的滚动阻力及优异的综合性能. 本文建立了一种简单有效调控天然橡胶纳米复合材料的填料网络结构与聚合物网络结构的方法, 赋予了天然橡胶基复合材料优异的综合性能.

关键词: 反式-1, 4-丁二烯-异戊二烯共聚橡胶, 天然橡胶, 填料网络, 聚合物双网络结构, 纳米复合材料

Abstract:

Trans-1,4-poly(butadiene-co-isoprene) copolymer rubber(TBIR) and wet mixing natural rubber masterbatch(W-NR) were used to modify natural rubber(NR) nanocomposites with different polymer network structures and filler network structures. The structure and properties of NR, NR/W-NR, NR/TBIR and NR/W-NR/TBIR rubber nanocomposites were investigated by means of carbon black packing dispersion apparatus, differential scanning calorimetry and equilibrium swelling method, etc. Compared with NR and NR/W-NR vulcanizates, the addition of TBIR component constructed special polymer network structures including sulfide bonds and polymer crystals acting as physical crosslinks in the NR matrix, which improved the modulus and green strength of the NR matrix, provided better filler dispersion, and improved filler-rubber interactions. Therefore, compared with NR and NR/W-NR vulcanizates, the NR/TBIR(90/10) and NR/W-NR/TBIR(40/66.5/10) vulcanizates showed improved DIN abrasion resistance, enhanced tensile fatigue property, reduced rolling resistance, and better aging resistance. The NR/W-NR/TBIR(40/66.5/10) vulcanizate prepared by combining the advantages of W-NR and TBIR together presented much lower rolling resistance, as well as excellent comprehensive properties. This work provides a facial and effective regulation way to adjust the polymer network structure and filler network structure, and fabricate NR nanocomposites with excellent comprehensive properties.

Key words: Trans-1, 4-(butadiene-co-isoprene) copolymer rubber, Natural rubber, Filler network, Polymeric double network structure, Nanocomposite

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