Diphenylphenacyl sulfonium salt as dual photoinitiator for free radical and cationic polymerizations

被引：25

作者：

Kaya, Kerem ^{[1
]}

Kreutzer, Johannes ^{[1
]}

Yagci, Yusuf ^{[1
,2
]}

机构：

[1] Istanbul Tech Univ, Dept Chem, TR-34469 Istanbul, Turkey

[2] King Abdulaziz Univ, Dept Chem, Fac Sci, Jeddah, Saudi Arabia

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2018年 / 56卷 / 04期

关键词：

calorimetry; cleavage reaction; cationic polymerization; free radical polymerization; phenacyl onium salts; photoinitiator; sensitization; sulfonium salts; N-ALKOXY-PYRIDINIUM; CYCLOHEXENE OXIDE; PHOSPHONIUM SALTS; INITIATORS; PHOTOPOLYMERIZATION; COMPLEX;

D O I：

10.1002/pola.28918

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Diphenylphenacylsulfonium tetrafluoroborate (DPPS+BF4-) salt possessing both phenacyl and sulfonium structural units was synthesized and characterized. DPPS+BF4- absorbs light at relatively higher wavelengths. The direct and sensitized initiation activity of the salt in both cationic and free radical photopolymerizations was investigated and compared with that of its analogue triphenylsulfonium tetrafluoroborate (TPS+BF4-). Differential scanning photocalorimetry and conventional gravimetric studies revealed that DPPS+BF4- showed higher efficiency for direct and sensitized photopolymerizations of most of the monomers investigated. Although, principally both homolytic and/or heterolytic cleavage is possible, theoretical studies suggested that homolytic pathway is more favored for the generation of reactive initiating species. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 451-457

引用

页码：451 / 457

页数：7

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