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Study on spatial–temporal kinetics of photo‐initiated frontal polymerization in stacked reaction cells
Author(s) -
Tao Youji,
Yang Jianwen,
Zeng Zhaohua,
Cui Yanyan,
Chen Yonglie
Publication year - 2006
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.1988
Subject(s) - polymerization , dispersity , kinetics , polymer chemistry , photobleaching , materials science , bulk polymerization , molar mass distribution , chemistry , photochemistry , radical polymerization , polymer , organic chemistry , optics , physics , quantum mechanics , fluorescence
The spatial–temporal kinetics for photo‐initiated frontal polymerization(PFP) of isobornyl acrylate with 2,4,6‐trimethylbenzoyldiphenyl phosphine oxide (TPO) as photobleaching initiator was studied experimentally in stacked reaction cells. FTIR and NMR spectroscopy were employed to measure the polymerization conversion, which is dependent on the exposure time, sample depth, light intensity and photo‐initiator concentration. The experimental results are consistent with the theoretical model prediction and show that prolonged irradiation time, higher light intensity and lower photo‐initiator concentration are favorable in enhancing the advance of the polymerization front. The depth‐resolved GPC analysis shows that the average molecular weight of the PFP product dramatically increases with sample depth, while the molecular weight polydispersity reduces steadily with increase in sample depth. Copyright © 2006 Society of Chemical Industry