Abstract
A novel poly(tetramethyl-1,3-silphenylenesiloxane) derivative having adamantyl moiety, i.e., poly(tetramethyl-5-adamantyl-1,3-silphenylenesiloxane) (P1) was synthesized by solution polycondensation of a novel disilanol monomer, i.e., 1-[3,5-(dimethylhydroxysilyl)phenyl]adamantane (M1). M1 was prepared by the Grignard reaction using chlorodimethylsilane and 1-(3,5-dibromophenyl)adamantane, followed by the hydrolysis catalyzed by 5% palladium on charcoal. P1 exhibited the good solubility in common organic solvents, such as tetrahydrofuran (THF), chloroform, dichloromethane, benzene, and toluene at ambient temperature. P1 was also soluble in hot hexane, diethyl ether, and ethyl acetate. The glass transition temperature (T g) and temperature at 5% weight loss (T d5) of P1 were 85 and 517 °C, respectively, and much higher than those of poly(tetramethyl-1,3-silphenylenesiloxane), indicating that P1 is a new polysiloxane derivative with good solubility as well as good thermostability.
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Acknowledgments
This work was partly supported by 2008 Research Grant of College of Engineering, Nihon University. The authors would like to appreciate Dr. Chuichi Watanabe and Dr. Tetsuro Yuzawa, Frontier Laboratories Ltd., for the contribution in GC/MS analyses; and Ms. Satoko Tokiwa as well as Ms. Nami Sugashima, Nihon University College of Engineering Worldwide Research Center for Advanced Engineering and Technology (NEWCAT), for performing NMR measurements.
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Hattori, Y., Nemoto, N. Synthesis and thermal characterization of novel poly(tetramethyl-1,3-silphenylenesiloxane) derivative bearing adamantyl moiety. Polym. Bull. 63, 497–507 (2009). https://doi.org/10.1007/s00289-009-0110-7
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DOI: https://doi.org/10.1007/s00289-009-0110-7