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High-Performance Nonisocyanate Thermoplastic Polythiourethane with High Hydrogen Bond Content
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-03-25 , DOI: 10.1021/acsmacrolett.2c00084 Bowen Xu 1 , Qichen Yin 1 , Chang Su 1 , Jue Cheng 1 , Junying Zhang 1 , Jingbo Zhao 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-03-25 , DOI: 10.1021/acsmacrolett.2c00084 Bowen Xu 1 , Qichen Yin 1 , Chang Su 1 , Jue Cheng 1 , Junying Zhang 1 , Jingbo Zhao 1
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Nonisocyanate polyurethane (NIPU) has been extensively studied because of its sustainability potential. However, the low reactivity of five-membered cyclocarbonates with amines and the side reactions at higher temperatures always sacrifice the performance of NIPUs. In this work, a bisphenol-S cyclic thiocarbonate and different amino-terminated dimer-acid polyamides (DAPAs) were used to prepare nonisocyanate polythiourethanes (SPTU-DAs). Wherein bisphenol-S acts as a hard segment due to a π–π package, plentiful hydrogen bonds introduced by DAPA units induce crystallization and nanophase separation. They both endow the NIPUs with high mechanical performance. Meanwhile, active cyclic thiocarbonate, instead of cyclic carbonate, ensures rapid synthesis under mild conditions without side reactions. The experimental results of DSC, WAXD, and DMA confirmed the existence of crystallization of SPTU-DAs. The as-prepared thermoplastic polythiourethane has a maximum strength of more than 10 MPa, which is stronger than those of the cross-linked nonisocyanate polythiourethanes reported. It is of key significance to obtain the high performance of nonisocyanate polythiourethanes.
中文翻译：
具有高氢键含量的高性能非异氰酸酯热塑性聚硫氨酯
非异氰酸酯聚氨酯 (NIPU) 因其可持续性潜力而被广泛研究。然而，五元环碳酸酯与胺的低反应性和较高温度下的副反应总是会牺牲 NIPU 的性能。在这项工作中，双酚-S 环状硫代碳酸酯和不同的氨基封端二聚酸聚酰胺 (DAPAs) 用于制备非异氰酸酯聚硫代氨基甲酸酯 (SPTU-DAs)。其中双酚-S 由于 π-π 封装而充当硬链段，DAPA 单元引入的大量氢键诱导结晶和纳米相分离。它们都赋予 NIPU 高机械性能。同时，活性环状硫代碳酸酯代替环状碳酸酯，确保在温和条件下快速合成，无副反应。DSC、WAXD、和 DMA 证实了 SPTU-DAs 结晶的存在。所制备的热塑性聚硫氨酯的最大强度超过 10 MPa，比报道的交联非异氰酸酯聚硫氨酯的强度高。获得高性能的非异氰酸酯聚硫氨酯具有关键意义。
更新日期：2022-03-25
中文翻译：
具有高氢键含量的高性能非异氰酸酯热塑性聚硫氨酯
非异氰酸酯聚氨酯 (NIPU) 因其可持续性潜力而被广泛研究。然而，五元环碳酸酯与胺的低反应性和较高温度下的副反应总是会牺牲 NIPU 的性能。在这项工作中，双酚-S 环状硫代碳酸酯和不同的氨基封端二聚酸聚酰胺 (DAPAs) 用于制备非异氰酸酯聚硫代氨基甲酸酯 (SPTU-DAs)。其中双酚-S 由于 π-π 封装而充当硬链段，DAPA 单元引入的大量氢键诱导结晶和纳米相分离。它们都赋予 NIPU 高机械性能。同时，活性环状硫代碳酸酯代替环状碳酸酯，确保在温和条件下快速合成，无副反应。DSC、WAXD、和 DMA 证实了 SPTU-DAs 结晶的存在。所制备的热塑性聚硫氨酯的最大强度超过 10 MPa，比报道的交联非异氰酸酯聚硫氨酯的强度高。获得高性能的非异氰酸酯聚硫氨酯具有关键意义。
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