Online Detection and Modeling of Methyl Methacrylate Bulk Polymerization Kinetics in Frame Molds
XING Haoran1, ZHENG Zhongchuan2, LIU Changwei2, HOU Chaojun2, BAO Yongzhong1
1. State Key Laboratory of Chemical Engineering and Low-Carbon Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China;
2. Jinxi Chemical Research Institute Company Limited, Huludao 125003, China
Abstract： To optimize the bulk polymerization technology for preparing of polymethyl methacrylate (PMMA, organic glass) sheets within a plate-frame mold, an online Raman spectroscopy detection technique for real-time monitoring of MMA polymerization conversion, and a coupled kinetic/heat transfer simulation model were set up in this work. Spectral processing method was optimized to reduce detection errors and experimental conversion data obtained from synthesis of 31 mm-thick PMMA sheets was applied to validate and refine the simulation model. The kinetics detection method and model were further applied to polymerization system in preparing of 160 mm-thick PMMA sheets under water-bath cooling. The refined model demonstrated good consistency with experimental data, enabling effective temperature control during polymerization and preventing thermal runaway. The model also revealed significant spatial and time dependence characteristics of polymerization system temperature and PMMA molecular structure in the synthesis process of thick PMMA sheets. This work would offer theoretic support for optimizing the technology of industrial-scale production of thick PMMA sheets.
XING Haoran,ZHENG Zhongchuan,LIU Changwei et al. Online Detection and Modeling of Methyl Methacrylate Bulk Polymerization Kinetics in Frame Molds[J]. Chemical Reaction Engineering and Technology, 2025, 41(6): 637-647.
