Synergistic enhancement of magic triangle properties of PC tread stocks modified by amine-capped trans-1,4-poly (butadiene-co-isoprene)

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-10-05 DOI:10.1016/j.compscitech.2024.110899

Shufang Luo , Kaixuan Dong , Shuo Wang, Aihua He

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Abstract

The development of high-performance “green tires” with synergistically improved “magic triangle” properties like lower rolling resistance, higher wet-skid resistance and higher abrasion resistance has always been a hot issue. In this work, an effective strategy for developing high-performance “green tires” with simultaneously improved “magic triangle” properties of solution-polymerized styrene-butadiene rubber (SSBR)/cis-1,4-polybutadiene rubber (BR) nanocomposites modified by amine-capped trans-1,4-poly(butadiene-co-isoprene) copolymers (F-TBIR) was proposed. A series of F-TBIR with 10–60 mol% amine-capped efficiency (CE) and 30-90 × 10⁴ weight-average molecular weight (M_w) were synthesized by using heterogeneous TiCl₄/MgCl₂–Al(i-Bu)₃ Ziegler-Natta catalyst with dicyclohexylamine (DCHA) as chain transfer agent (CTA). With the increase in CE of F-TBIR, the silica-filled SSBR/BR/F-TBIR compounds exhibited improved green strength, modulus at 100 % elongation and bound rubber, and their vulcanizates showed synergistically improved “magic triangle” properties like obviously reduced rolling resistance and abrasion loss, and increased wet-skid resistance. It was found that the incorporation of 10 phr F-TBIR3 with CE of 60 mol% and M_w of 32 × 10⁴ resulted in highly expected properties of the SSBR/BR/F-TBIR3 nanocomposite. The contribution mechanism of F-TBIR3 was discussed based on the improvements of polymer network structures and filler network structures. This work is expected to provide an effective strategy to construct the desired network structures for high-performance rubber composites.

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通过胺封端反式-1,4-聚（丁二烯-共异戊二烯）改性聚碳酸酯胎面料，协同增强其神奇三角特性

开发具有协同改善 "神奇三角 "特性的高性能 "绿色轮胎"，如更低的滚动阻力、更高的湿滑阻力和更高的耐磨性，一直是一个热点问题。本研究提出了一种有效的策略，利用胺封端反式-1,4-聚（丁二烯-异戊二烯）共聚物（F-TBIR）改性的溶液聚合丁苯橡胶（SSBR）/顺式-1,4-聚丁二烯橡胶（BR）纳米复合材料，开发具有同时改善 "神奇三角 "性能的高性能 "绿色轮胎"。采用异相 TiCl4/MgCl2-Al(i-Bu)3 Ziegler-Natta 催化剂，以二环己胺（DCHA）为链转移剂（CTA），合成了一系列胺封端效率（CE）为 10-60 mol%、重量平均分子量（Mw）为 30-90 × 104 的 F-TBIR。随着 F-TBIR CE 的增加，二氧化硅填充的 SSBR/BR/F-TBIR 复合物的生坯强度、100% 拉伸模量和结合橡胶性能均有所提高，其硫化胶的 "神奇三角 "性能也得到了协同改善，如滚动阻力和磨损损耗明显降低，耐湿滑性能提高。研究发现，掺入 10 phr F-TBIR3（CE 为 60 mol%，Mw 为 32 × 104）后，SSBR/BR/F-TBIR3 纳米复合材料具有非常理想的性能。基于聚合物网络结构和填料网络结构的改进，讨论了 F-TBIR3 的贡献机制。这项工作有望为构建高性能橡胶复合材料所需的网络结构提供有效策略。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.