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Second order non-linear optical interpenetrating polymer networks based on polyurethane or poly(methyl methacrylate) and epoxy polymer

✍ Scribed by Zhang, Lingzhi; Cai, Zhigang; Xu, Zeda; Yu, Qingshui; Liang, Zhaoxi

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
104 KB
Volume
48
Category
Article
ISSN
0959-8103

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✦ Synopsis

Two interpenetrating polymer networks (IPNs), (one pseudo-IPN consisting of a linear polyurethane/epoxy-based polymer network and one full-IPN consisting of a poly(methyl methacrylate)/epoxy-based polymer network) have been synthesized and characterized. Both IPNs showed only one T g ; hence a homogeneous phase morphology is suggested. The second-order non-linear optical coef®cients (d 33 ) of the pseudo-IPN and the full-IPN were measured and found to be 2.78 Â 10 À7 esu and 1.86 Â 10 7 esu, respectively. The study of temporal stability at room temperature and elevated temperature (120 °C) indicates that the full-IPN is more ef®cient at improving the orientational stability of the non-linear optical chromophores than the pseudo-IPN, because of the permanent entanglements of the two component networks in the full-IPN.

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