Bicyclo‐orthoester as a low‐shrinkage additive in cationic UV curing | Zendy

Sangermano Marco | Zendy; Malucelli Giulio | Zendy; Delleani Gabriele | Zendy; Priola Aldo | Zendy

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Bicyclo‐orthoester as a low‐shrinkage additive in cationic UV curing

Author(s) -

Sangermano Marco,

Malucelli Giulio,

Delleani Gabriele,

Priola Aldo

Publication year - 2007

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.2263

Subject(s) - cationic polymerization , tmpta , shrinkage , photopolymer , curing (chemistry) , orthoester , materials science , polymer chemistry , polymerization , monomer , epoxy , photoinitiator , ether , elastomer , composite material , chemical engineering , chemistry , organic chemistry , polymer , engineering

A commercially available bicyclo‐orthoester (BOE) was used as low‐shrinkage additive for cationic UV curing of epoxy resins. A high reactivity of BOE by ring‐opening homopolymerization has been observed under cationic UV curing conditions. The BOE and trimethylolpropane triglycidyl ether monomers are compatible and give rise to a cured copolymeric network, under UV irradiation, with a flexibilization increase by increasing the BOE content in the photocurable formulation. Shrinkage after photopolymerization shows a linear reduction by increasing the BOE content in the photocurable formulation; a volume expansion upon polymerization is reached in the presence of 50 wt% of the additive. Copyright © 2007 Society of Chemical Industry

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