高性能可回收聚弹性体通过过渡应变强化
Chang Gao1, Kam C Poon1, Matilde Concilio1
1Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford, OX1 3TA, United Kingdom.
Advanced materials (Deerfield Beach, Fla.)
|April 16, 2025
概括
新的无形块聚弹性体通过短暂应变强化实现高强度和弹性,增强机械性能,同时保持可持续材料的可回收性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续材料 可持续材料
背景情况:
- 聚热塑性弹性体提供了可持续性,但通常会损害强度和弹性等机械性能.
- 实现强硬和坚固的弹性体通常涉及复杂的配方和交联/结晶性控制,阻碍了可回收性.
- 目前的方法在平衡机械性能与易于回收的方面面临挑战.
研究的目的:
- 开发具有改进的机械性能和可回收性的新型无形块聚弹性体.
- 为了提高强度和性,在完全无形结构中引入暂时应变刚性.
- 创造可持续的弹性体,克服现有材料的局限性.
主要方法:
- 商业化单体的受控聚合,以制造块共聚合物.
- 无形区块聚弹性体的合成,其中有一个中心的poly ((ɛ-caprolactone-co-ɛ-decalactone) 区块和poly ((cyclohexene oxide-alt-phthalate) 侧面区块.
- 通过调整e-caprolactone与e-decalactone的比率来调整热力学性能.
主要成果:
- 最好的弹性体 (30-50%重量%聚烯) 实现了高达40MPa的抗拉强度和破裂时延伸>2000%,弹性回收>90%.
- 材料表现出应变诱导的结晶,在拉伸力机械性质上表现优于商业弹性体.
- 证明了广泛的使用温度范围 (-60至140°C),高热稳定性 (≥300°C) 和出色的可回收性.
结论:
- 无形块聚弹性体中的过渡应变强化增强了强度和性,同时保持了可回收性.
- 这些新材料代表了可持续弹性体技术的重大进步.
- 开发的弹性体提供了机械性能,热稳定性和可回收性的优越组合.
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