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Tuning gradient property and initiating gradient photopolymerization of acrylamide aqueous solution of a hydrosoluble photocleavage polysiloxane‐based photoinitiator
Author(s) -
Cheng Jiye,
Jiang Shengling,
Gao Yanjing,
Wang Jiansheng,
Sun Fang
Publication year - 2014
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3378
Subject(s) - photoinitiator , photopolymer , materials science , polymer , aqueous solution , polymer chemistry , solubility , chemical engineering , dispersion (optics) , surface energy , composite material , surface tension , polymerization , monomer , organic chemistry , chemistry , optics , thermodynamics , physics , engineering
A novel hydrosoluble photocleavage polysiloxane photoinitiator W‐Si‐HHMP 2 used for preparing a gradient polymer was synthesized on the basis of 2‐hydroxy‐1‐[4‐(2‐hydroxyethoxy)phenyl]‐2‐methyl propan‐1‐one (HHMP) and aminopolysiloxane. The water solubility of the photoinitiator, the kinetics of photopolymerization, and the self‐floating ability were investigated. This photoinitiator shows relatively good solubility in water and excellent photoinitiating efficiency, and has good floating capability due to lower surface tension and energy of polysiloxane. More importantly, it is proved that the gradient polymer with gradient molecular weight was obtained by controlling the concentration gradient of W‐Si‐HHMP 2 and presented an excellent yellowing resistance. The enrichment of W‐Si‐HHMP 2 on the surface caused by its good self‐floating ability can decrease the dispersion surface energy of gradient polymer film and generate a more hydrophobic surface. The W‐Si‐HHMP 2 can efficiently initiate gradient photopolymerization to prepare gradient materials and has a great potential application in gradient materials. Copyright © 2014 John Wiley & Sons, Ltd.