| 硫化时间对绿色轮胎胎面胶交联网络结构与性能的影响 |
| Effect of Curing Time on Crosslinking Network Structures and Properties of Tread Compound of Green Tire |
| 投稿时间：2020-03-01 修订日期：2020-03-01 |
| DOI：10.12136/j.issn.1000-890X.2021.02.0119 |
| 中文关键词: 硫化时间 白炭黑 溶聚丁苯橡胶 顺丁橡胶 胎面胶 交联网络结构 物理性能 抗湿滑性能 滚动阻力 |
| 英文关键词: curing time silica SSBR BR tread compound crosslinking network structure physical properties wet skid resistance rolling resistance |
| 基金项目:国家重点基础研究发展计划（2015CB654700）；山东省自然科学基金资助项目（ZR2017ZA0304）；“泰山学者”建设工程专项经费资助项目 |
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| 中文摘要: |
| 针对以溶聚丁苯橡胶（SSBR）/顺丁橡胶（BR）并用胶为主体材料的绿色轮胎胎面胶，研究在不同硫化时间下未填充白炭黑的SSBR/BR并用胶（简称未填充白炭黑体系胶料）及填充白炭黑的SSBR/BR并用胶（简称填充白炭黑体系胶料）形成的交联网络结构与性能变化。结果表明：对于未填充白炭黑体系胶料，随着硫化时间的延长，硫化胶的交联密度略有降低，硬度、定伸应力、拉伸强度和回弹值等变化不大，撕裂强度提高，拉断伸长率和耐伸张疲劳性能降低；对于填充白炭黑体系胶料，随着硫化时间的延长，硫化胶的填料网络结构化程度逐渐提高，交联密度略增大，键能较低的多硫键减少，键能较高的单硫和双硫键增多，硫化胶的拉伸强度、回弹值、耐伸张疲劳性能和耐磨性能基本不变，生热和滚动阻力降低；未填充及填充白炭黑体系硫化胶的耐老化性能均随硫化时间的延长而逐渐提高，这表明以SSBR/BR并用胶为主体材料的胎面胶即使在高温下硫化较长时间，仍具有较好的性能。 |
| 英文摘要: |
| For the green tire tread compound with solution polymerized styrene-butadiene rubber
（SSBR）/butadiene rubber（BR） blend as the main material，the changes of the crosslinking network structures and physical properties of silica filled SSBR/BR blend（referred as filled silica system compound）and silica unfilled SSBR/BR blend（referred as unfilled silica system compound） under different curing time were studied.The results showed that，for silica unfilled system compound，with the prolonging of the curing time，the crosslinking density of the vulcanizates decreased slightly，the hardness，modulus，tensile strength and rebound value were changed little，the tear strength increased，the elongation at break and tensile fatigue properties decreased.For the silica filled system compound，with the prolonging of the curing time，the filler networks structural degree of the vulcanizates was improved gradually，the crosslinking density increased，the polysulfide bonds with lower bond energy were fallen，the mono- and di-sulfur bonds with higher bond energy were grown，the tensile strength，rebound value，tensile fatigue property and wear resistance were basically unchanged，the heat build-up and rolling resistance decreased.The aging resistance of the two system vulcanizates were both improved with the prolonging of curing time，which showed that the tread compound with SSBR/BR blend as the main material had better properties even though it was cured at high temperature for a long time.unfilled SSBR/BR vulcanizates improve with increasing curing time. |
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