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Cyclocopolymerization of d-limonene with maleic anhydride

✍ Scribed by T. Doiuchi; H. Yamaguchi; Y. Minoura


Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
618 KB
Volume
17
Category
Article
ISSN
0014-3057

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✦ Synopsis


d-Limonene (Lim), a nonconjugated 1,5-diene, was copolymerized with maleic anhydride (MAn) in tetrahydrofuran with ct,ct'-azobisisobutyronitrile as initiator. The composition, spectral analyses, and other physical properties of the resulting copolymer and its hydrolysed product suggest that Lim readily undergoes an inter-intramolecular cyclocopolymerization with MAn, leading to a 1:2 alternating copolymer. The findings and the proposed cyclocopolymerization mechanism are consistent with participation of a charge-transfer complex of the comonomers in the propagation step. The copolymers are optically active and their CD spectra are characterized by dichroic bands attributable to electronic transitions of carbonyl or carboxylic chromophores.


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