STUDY ON PHOTOINITIATED CATIONIC POLYMERIZATION Ⅱ. POLYMERIZATION KINETICS OF n-BUTYL VINYL ETHER PHOTOINITIATED WITH SULFONIUM SALT DPTS

doi:10.7517/j.issn.1674-0475.1992.01.51

Abstract

Abstract: The bulk and solution photopolymerization of vinyl butyl ether were studied using diph-enyl-4-thiophenoxyphenyl sulfonium salt (DPTS) as photoinitiator. In bulk polymerization, the rate of polymerization (R_p)was proportional to the concentration of photoinitiator. The activation energy was nearly zero within the temperature range 15-35℃. In solution polymerization using CHCl₃, (CH₂Cl)₃ and C₈H₅Cl as solvents, R_p was found to be greater than that for bulk polymerization and the relation between R_p and monomer concentration was rather complicated. By taking into account the generally accepted photolytic mechanism of onium salt and the possible involvement of solvent and monomer in the initiation, the kinetics of solution polymerization was interpreted.

Key words: sulfonium salt photoinitiator, vinyl butyl ether, bulk and solution photo-polymerization, initiation mechanism, kinetics

CHEN YONG-LIE, GUAN YONG-JIAN, LIANG ZHAO-XI. STUDY ON PHOTOINITIATED CATIONIC POLYMERIZATION Ⅱ. POLYMERIZATION KINETICS OF n-BUTYL VINYL ETHER PHOTOINITIATED WITH SULFONIUM SALT DPTS[J]. Imaging Science and Photochemistry, 1992, 10(1): 51-57.

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STUDY ON PHOTOINITIATED CATIONIC POLYMERIZATION Ⅱ. POLYMERIZATION KINETICS OF n-BUTYL VINYL ETHER PHOTOINITIATED WITH SULFONIUM SALT DPTS

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