Pd (II)‐catalyzed vinyl addition polymerization of novel functionalized norbornene bearing dimethyl carboxylate groups |
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| Authors: | Binyuan Liu Yang Li Boo‐Gyo Shin Do Yeung Yoon IL Kim Li Zhang Weidong Yan |
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| Affiliation: | 1. Institute of Polymer Science and Engineering, School of Chemical Engineering,Hebei University of Technology, Tianjin 300130, China;2. Binyuan Liu, Institute of Polymer Science and Engineering, School of Chemical Engineering,Hebei University of Technology, Tianjin 300130, China;3. Do Yeung Yoon, School of Chemistry, Seoul National University, Seoul 151‐747, Korea;4. School of Chemistry, Seoul National University, Seoul 151‐747, Korea;5. Department of Polymer Science and Engineering, Pusan National University, Busan 609‐735, Korea |
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| Abstract: | ![]()
Three novel functionalized polynorbornenes (PNB) with pendant dimethyl carboxylate group (carboxylates—acetate, propionate, and butyrate) are synthesized as a vinyl‐type with a palladium (II) catalyst in high yield. The effects of size of substitutents, molar ratio of monomer to catalyst, solvent polarity, reaction time, and temperature on the polymerization of exo‐norbornene dimethyl propionate were systematically investigated. The low molar ratio and temperature, as well as high polarity of solvent, and long reaction time, are favorable for the enhancement of the monomer conversion, especially, the solvent have an obvious effect on the catalyst activity. The resulting poly(cis‐norbornene‐exo‐2,3‐dimethyl carboxylates) (PNB‐dimethyl carboxylates) show good solubility in common organic solvent and high thermal stability up to 360 °C. The glass transition temperature was detected by DMA at 331, 324, and 318 °C for acetate, propionate, and butyrate, respectively. © 2007 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 3391–3399, 2007 |
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| Keywords: | cis‐norbornene‐exo‐dimethyl carboxylates catalysts functional polynorbornenes Pd (II) catalyst high performance polymer polyolefins vinyl addition polymerization |
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