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Abstract

Organic salts as initiators [A? +B?: Ph?3C+ClO? 4, Ph?3C+SbCl? 6, (?)Sp? +ClO? 4, and (?)(Sp)?2 3+(ClO4)? 3] and catalysts [A +B??: (+)CSA?; A? +B??: ph?3C+(+)CSA?? and (?)Sp?+(+)CSA??] are prepared and characterized by the dissociation constant (K d), fraction of free ions (α), and specific rotation. The asymmetrically stereoselective induction of the initiators and catalysts in the polymerization of N-vinylcarbazole is in the order A? +B?? > A +B?? > A? +B?. The specific rotations of the poly(N-vinylcarbazole) (PVCZ)s obtained are generally in this order.  相似文献   

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Several books have been published on the history of Polymer Science [1–5], and most of the post-1899 history parallels the lifetime of Dr. Maurits Dekker, who was born in Holland on March 18, 1899.  相似文献   

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