Effect of Accelerators on the Curing of Unsaturated Polyester Resins: Kinetic Model for Room Temperature Curing,Industrial & Engineering Chemistry Research

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Effect of Accelerators on the Curing of Unsaturated Polyester Resins: Kinetic Model for Room Temperature Curing
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-28 , DOI: 10.1021/acs.iecr.1c02963
Eliška Matušková ₁ , Jaromír Vinklárek ₂ , Jan Honzíček ₁

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Several iron and vanadium compounds were evaluated as accelerators for curing of unsaturated polyester resins, serving as alternatives to toxic cobalt(II) carboxylates currently in widespread use in the composite industry. The catalytic power of the given metal-based compounds has been verified by gelation time measurements on a multipurpose unsaturated polyester/styrene/methyl ethyl ketone peroxide system. Due to different demands of the application sphere, our detailed investigation of the curing process has covered two extreme situations: the behaviors of the accelerators under adiabatic and isothermal conditions. Exothermic behavior in the thermally isolated system, followed by a K-type thermocouple, enabled recognition of the inhibition of the curing process at high concentration of the accelerator and verification of its thermal stability. At isothermal conditions, a radical copolymerization process has been followed by real-time near-infrared spectroscopy, which enabled the establishment of a kinetic model for precise quantification of the catalytic effect for given accelerators.

中文翻译：

促进剂对不饱和聚酯树脂固化的影响：室温固化动力学模型

评估了几种铁和钒化合物作为不饱和聚酯树脂固化的促进剂，作为目前在复合材料工业中广泛使用的有毒羧酸钴 (II) 的替代品。通过在多用途不饱和聚酯/苯乙烯/甲乙酮过氧化物系统上进行凝胶时间测量，已经验证了给定金属基化合物的催化能力。由于应用领域的不同需求，我们对固化过程的详细研究涵盖了两种极端情况：加速剂在绝热和等温条件下的行为。热隔离系统中的放热行为，以及 K 型热电偶，能够识别高浓度促进剂下固化过程的抑制并验证其热稳定性。

更新日期：2021-10-06

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