半晶体聚烯混合的共价适应网络,具有三重形状记忆效应
Hann Lee1,2, Yujin Jang1,2, Young-Wook Chang1,2
1Department of Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.
Polymers
|October 16, 2024
概括
研究人员从聚烯烯混合物中开发了一种可回收的共价适应网络 (CAN),表现出三重形状记忆效应. 这种创新材料为先进的应用提供了增强的机械性能和可重加工性.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 热塑性聚烯混合物提供了多功能性,但往往缺乏强大的机械性能和长期稳定性.
- 共价可适应网络 (CAN) 提供动态交叉连接,以提高材料性能和可回收性.
- 形状记忆聚合物 (SMP) 能够使材料在刺激时恢复原始形状,提供高级功能.
研究的目的:
- 从半晶聚烯混合物制造一个新的共价适应网络 (CAN).
- 为了研究三重形状记忆效应和聚烯混合物中的化学交联.
- 评估开发的CAN的机械性能,热性能和再加工能力.
主要方法:
- 性聚烯 (mPP) 和性聚烯弹性体 (mPOE) 与四功能醇 (PETMP) 和TBD的反应融化混合.
- 使用里叶变换红外光谱 (FTIR),差分扫描热量计 (DSC),动态机械分析 (DMA) 和扭矩变化监测进行了表征.
- 机械测试包括拉伸强度和破裂测量时的延伸.
- 溶解性测试和重复的化处理,以评估可回收性和再加工性.
主要成果:
- 从mPP/mPOE混合物中成功制造出一种化学交联的CAN,这种CAN通过乙烯点击化学.
- 通过FTIR,扭矩变化,可溶性测试和DMA确认交联.
- DSC分析显示了两种不同的化过渡,表明两种聚烯成分的结晶性得到保留.
- 与简单的混合物相比,增强了拉力强度和破裂时的延长.
- 在经过多次化处理后保持了机械性能,显示出出色的再加工能力.
结论:
- 开发的CAN表现出有希望的三重形状记忆效果和增强的机械性能.
- 交叉连接的聚烯混合物表现出良好的可回收性和再加工性,将热塑性混合物转化为高性能材料.
- 这项研究突出了CAN在创造附加值,可持续的聚烯烯基材料方面的潜力.
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