Summary: After the condensation polymerization of benzoguanamine (BGA) and pyromellitic dianhydride (PMDA) under microwave irradiation, the resulting p‐π conjugate poly(amic acid) was grafted via the azo coupling reaction. The obtained side‐chain polymers were further grafted with TDI‐aliphatic alcohol derivatives and TDI‐aniline derivatives. The third‐order NLO coefficient and response time of PAA and graft polymers were measured by degenerated four wave mixing (DFWM) technique and their fluorescent properties were also investigated. All of the graft polymers have larger NLO coefficients and film‐formability than PAA. Their fluorescent properties were also changed by the different electronic effect of the side‐chains. The influences of the introduction of side‐chains, the side‐chain length and the electronic effect of the substituting groups on the azobenzol side‐chain to both optical properties of the polymers by varying the conjugation degree were investigated. magnified image

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ABSTRACT:The copolymerization of methacrylic acid, 2-(dimethylamino) ethyl ester (DM), and allythiourea (AT) was studied under microwave, and the copolymer-copper coordinates Cu-P(DM-Co-AT) was synthesized by the coordination between Cu 2ϩ and the copolymer. IR, X-ray photoelectron spectroscopy, and electronic spin resonance were used to analyze the structure of Cu-P(DM-Co-AT). The results showed that the inherent viscosity of the copolymer obtained by microwave irradiation can be the maximum of 37.75 ml/g, and the productive rate can be 92%. The obtained Cu-P(DM-Co-AT) can heterogeneously catalyze the polymerization of methyl methacrylate at room temperature. The maximal molecular weight of poly(methyl methacrylate) was 1,400,000.

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