聚烯的功能化和重新使用,使其成为耐热聚氨
Ronard Herrera Monegro1, Ramanan Krishnamoorti1, Megan L Robertson1,2
1William A. Brookshire Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States.
ACS macro letters
|October 10, 2024
概括
研究人员将聚烯 (PP) 废弃物转化为可化处理的热聚氨 (PU). 这种上循环方法可以保存PPPP.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚烯废料在实现循环经济方面构成了重大挑战.
- 使用后修改提供了一种可行的策略,用于升级聚烯的循环,增强其性能和延长其寿命.
- 在聚烯 (PP) 上植入氨酸无水化物是一种既定的方法,以增加其反应性以进一步功能化.
研究的目的:
- 为聚烯废物开发一个有效的回收途径.
- 从聚烯制造一个可化处理的热聚合物.
- 调查聚烯上循环转化为聚氨的可能性.
主要方法:
- 无化马氏体接种的聚烯被氧化.
- 氧化聚烯用二酸固化,形成一个耐热聚氨 (PU).
- 分析了产生的PU的结构和机械特性,包括其晶体结构,模量,玻璃过渡温度和结晶性.
主要成果:
- 原始聚烯的晶体结构被保留在产生的聚氨中.
- 由于PP结晶,PU在室温下表现出高模量,在更高的温度下过渡到状高原.
- 与前体PP相比,PU表现出更高的玻璃过渡温度和更低的结晶性,这是由于其交联性质.
- 通过多个再加工周期,PU保持了机械完整性,这在尿交换催化剂的帮助下得到了促进.
结论:
- 聚烯废弃物的功能化和回收利用为耐热聚氨是一种有前途的废弃物再利用途径.
- 这种方法产生了可化处理的耐热材料,扩大了回收聚烯的潜在应用.
- 维护PP的晶体结构和创建一个交联网络有助于材料的独特特性和再加工能力.
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