Topochemical reactions of monomers with conjugated triple‐bonds. IV. Polymerization of bis‐(p‐toluene sulfonate) of 2.4‐hexadiin‐1.6‐diol

Wiley - Tập 145 Số 1 - Trang 85-94 - 1971
Gerhard Wegner1
1Institut fur Physikalische Chemie, der Universitat Mainz, II. Ordinariat, Mainz, Germany

Tóm tắt

AbstractSolid‐state polymerization of the bis‐(p‐toluene sulfonate) of 2.4‐hexadiin‐1.6‐diol was achieved by UV‐irradiation or by annealing the monomer crystals below their melting‐point. Deep red polymer crystals having the original shape of the monomer crystals exhibiting strong dichroism are obtained. Polymerization proceeds by 1.4‐addition to the conjugated triple‐bonds to form a polymer with three cumulated double bonds per baseunit and a fully conjugated backbone. Photopolymerization is rather fast and does not show an induction period. The relationship between ηsp/c‐values and conversion as well as X‐ray work indicates that the formation of nuclei must be an important feature of the reaction mechanism. Thermal (spontaneous) polymerization shows a considerable induction period and very high viscosity‐values are obtained for thermal polymers.

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Tài liệu tham khảo

Wegner G., 1969, Z. Naturforsch., 824, 10.1515/znb-1969-0708

G.WegnerundE. W.Fischer Kinetics and Mechanism of Polyreactions IUPAC International Symposium Macromolecular Chemistry Budapest 1969 Vol. 4 p. 103.

10.1002/macp.1970.021340119

G.Wegner Habilitationsschrift Mainz 1970.

10.1002/ange.19710830709

A.ChapiroinAction Chimiques et Biologiques des Radiations M.Haissinsky Ed. Xeme Serie Paris1966 p.188f.

Rao C. N. R., 1967, Progress in Solid‐State Chemistry, 131

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Wiley

Tập 145 Số 1

85-94

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