Carbon-13 NMR of Poly(Butadiene)

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 1972Publisher:Rubber Division, ACSJournal:Rubber Chemistry and Technology, volume 45, pages 1,283-1,294 (issn: 0035-9475, eissn: 1943-4804,

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Authors: V. D. Mochel;

doi: 10.5254/1.3544738 , 10.1002/pol.1972.150100406

Carbon-13 NMR of Poly(Butadiene)

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Abstract

Abstract By using the carbon-13 NMR technique, it is shown that there are no cis-1,4-trans-1,4 linkages in an n-BuLi-catalyzed poly (butadiene). The polymer consists of “blocks” of cis-1,4 units and trans-1,4 units separated by isolated vinyl units. Preliminary evidence suggests this might also be true for other types of 1,3-diene polymerization. Some of the implications of this finding on the mechanism of polymerization are discussed. Tacticity triad distributions are readily determined in poly(butadiene)s with high 1,2 addition contents.

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