{"title":"基于双酚 A 二缩水甘油醚的非异氰酸酯环氧乙烯基酯聚氨酯预聚物","authors":"Soheila Ghasemi, Milad Ghezelsofloo, Mahsa Naeimi, Bahman Tamami, Hamed Allahyari","doi":"10.1007/s13726-024-01289-7","DOIUrl":null,"url":null,"abstract":"<div><p>Vinyl ester resins (VERs) are one of the main categories of polymeric matrices for fabrication of high-performance commercial composites. They have more desirable properties compared with unsaturated polyester resins. Inserting urethane functional groups in the structure of VERs and producing urethane vinyl ester resin (UVER) improve its impact and chemical resistance, enlongation and toughness. The use of isocyanate as the primary resource in urethane preparation, which is derived from phosgene toxic material, may be associated with environmental hazards; as a result, non-isocyanate polyurethane (NIPU) methods have been developed. Herein, we have described the preparation and characterization of UVER by isocyanate-free system. 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引用次数: 0
摘要
乙烯基酯树脂（VER）是用于制造高性能商用复合材料的主要聚合物基材类别之一。与不饱和聚酯树脂相比，乙烯基酯树脂具有更理想的性能。在聚氨酯乙烯基酯树脂的结构中加入聚氨酯官能团并制成聚氨酯乙烯基酯树脂（UVER），可提高其抗冲击性、耐化学性、延展性和韧性。异氰酸酯是制备聚氨酯的主要原料，它来自于光气有毒物质，可能会对环境造成危害；因此，人们开发了非异氰酸酯聚氨酯（NIPU）方法。在此，我们介绍了不含异氰酸酯体系的 UVER 制备和表征方法。首先，用常压二氧化碳和四丁基溴化铵（TBAB）作为催化剂处理相应的环氧化物，合成环碳酸盐、2-羟基-3-(4-(环氧乙烷-2-基甲氧基)丁氧基)甲基丙烯酸丙酯（HOMBPM）和双酚-A 环氧树脂二缩水甘油醚（DGEBA）。然后，在不同催化剂的存在下，将制备的环碳酸盐与乙二胺反应，生成非异氰酸酯环氧乙烯酯聚氨酯预聚物。与 VER 相比，UVER 是一种潜在的化合物，可与 VER 一起固化并制造出具有更佳机械特性（如伸长率和拉伸强度）的材料。在合成所需的化合物时，使用了傅立叶变换红外光谱、1H 和 13C NMR 光谱以及滴定法等表征技术来测量环氧当量重量（EEW）、酸值和胺值。
Non-isocyanate epoxy vinyl ester urethane prepolymer based on diglycidyl ether of bisphenol-A
Vinyl ester resins (VERs) are one of the main categories of polymeric matrices for fabrication of high-performance commercial composites. They have more desirable properties compared with unsaturated polyester resins. Inserting urethane functional groups in the structure of VERs and producing urethane vinyl ester resin (UVER) improve its impact and chemical resistance, enlongation and toughness. The use of isocyanate as the primary resource in urethane preparation, which is derived from phosgene toxic material, may be associated with environmental hazards; as a result, non-isocyanate polyurethane (NIPU) methods have been developed. Herein, we have described the preparation and characterization of UVER by isocyanate-free system. First, cyclic carbonates of epoxides, 2-hydroxy-3-(4-(oxiran-2-ylmethoxy)butoxy)propyl methacrylate (HOMBPM) and diglycidyl ether of bisphenol-A epoxy resin (DGEBA) were synthesized by treatment of the corresponding epoxides with atmospheric pressure of carbon dioxide and tetrabutylammonium bromide (TBAB) as a catalyst. Then, the as-prepared cyclic carbonates were reacted with ethylenediamine in the presence of different catalysts to produce non-isocyanate epoxy vinyl ester urethane prepolymer. UVER is a potential compound for curing with VERs and fabricating materials with superior mechanical features such as elongation and tensile strength in comparison to VERs. Characterization techniques such as FTIR, 1H and 13C NMR spectroscopy and titration methods for measurements of epoxy equivalent weight (EEW), acid number and amine value are used in the synthesis of the desired compounds.
期刊介绍：
Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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