基于基结合聚丁基的甲酸盐的结构-性质行为 额外通过使用可持续的生物来源的乙烯 Ester 进行交叉链接
Aran Guner1, Frank Lee1, Daniel W Lester2
1International Institute of Nanocomposite Manufacturing (IINM), WMG, University of Warwick, Coventry CV4 7AL, U.K.
概括
功能性烯酸乙烯 Ester 增强基终结聚乙烯 (HTPB) 的特性. 这些生物基塑化剂提高了可混合性和机械强度,为各种应用中的弹性体提供了可持续的替代品.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 有机化学 有机化学
背景情况:
- 基终结聚乙烯 (HTPB) 是一种具有出色的机械和低温性能的多功能弹性体,广泛用于推进剂和涂料.
- 目前用于HTPB的塑化剂面临着诸如迁移,混合性差,依赖不可再生资源等挑战.
- 从可再生松树中提取的罗辛 Ester,为传统塑化剂提供了潜在的可持续替代品.
研究的目的:
- 为了研究与HTPB混合的烯酸乙烯的混合性和交联行为.
- 评估烯酸乙对HTPB弹性体机械性能的影响.
- 探索功能性树脂烯酸乙作为可持续的增塑剂,以获得定制的HTPB特性.
主要方法:
- 将HTPB与不同重量百分比 (高达20%重量百分比) 的各种烯酸乙混合在一起.
- 使用多二酸进行HTPB/烯酸乙混合物的交叉链接.
- 使用差分扫描热度计 (DSC) 进行玻璃过渡温度 (Tg) 的表征.
- 同时进行广角X射线散射 (WAXS) 和小角X射线散射 (SAXS),以评估可混合性和相位分离.
- 机械测试包括破裂时的延长 (ε) 和最终抗拉强度 (σ).
主要成果:
- 所有研究的烯酸乙完全与HTPB混合,由单个Tg表示.
- WAXS和SAXS证实,HTPB/烯酸乙混合物中没有相分离.
- 只有功能性乙烯 (T3) 参与了交叉链接反应,增加了域间尺寸.
- 用10%重量%的T3修改的HTPB在破裂时显著增加延长 (600%),而不会损害拉伸强度.
- 用20%重量%的T3修改的HTPB在断裂和应变硬化行为时表现出了惊人的1200%的延长.
结论:
- 功能性树脂烯酸乙烯与HTPB混合,可以集成到交叉连接网络中.
- 使用功能性树脂质可以显著增强HTPB的机械性能,特别是破裂时的延长.
- 这些生物基 Ester 提供了一条可持续的途径,为苛刻的应用量身定制HTPB弹性体性能.
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