Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 38, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201600660
Keywords
cationic polymerization; dual-cure; epoxides; kick-starting; pyrylium salt
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Funding
- Mader AA
- Agence National de la Recherche
- program Chaire Industrielle Deepcure [ANR-13-CHIN-0004-01]
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Pyrylium salts combined with vinyl ethers are shown to act as new versatile dual-cure initiating systems for both photochemical and thermal initiation of oxirane monomers. The combination of both possibilities allows the curing of thick samples through photoinduced frontal polymerization. On the basis of quantum calculations and photochemical experiments, some clues are given about the reaction mechanisms involved. Interestingly, a sequential kick-starting effect is observed in the presence of vinyl ether enabling the curing of oxetane monomers. Thereby, this communication presents a short overview of potential of pyrylium salts in cationic polymerization of oxiranes.
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