Copolymerization of Higher Alkyl Vinyl Ethers IV. Copolymerization with Vinyl Chloride and Properties of Copolymers

• Published in: Kobunshi Kagaku Vol. 17; no. 184; pp. 478 - 482
• Main Authors: Akazome, Giichi, Sakai, Shizuyoshi, Choshi, Yasuo, Murai, Koichi
• Format: Journal Article
• Language: Japanese
• Published: The Society of Polymer Science, Japan 25.08.1960
• ISSN: 0023-2556; 1884-8079
• DOI: 10.1295/koron1944.17.478

Vinyl chloride is copolymerized with higher alkyl (n-octyl-n-octadecyl) vinyl ethers at 50°C in the presence of benzoyl peroxide as the initiator. Monomer reactivity ratios of vinyl chloride (M1) and vinyl ether (M2) are as follows: Vinyl octyl ether r1=1.90±0.20, r2=0.1±0.1 Vinyl dodecyl ether r1=1.93±0.15, r2=0.15±0.2; Vinyl octadecyl ether r1=2.10±0.20, r2=-0.1±0.2. Rates of copolymerization, reduced viscosities, tensile strengthes and densities of copolymers decrease, as the content of vinyl ether in the monomer mixture increases. Though the solubilities of the copolymers are improved by the small amount of vinyl ethers, it is probably necessary to use vinyl ether more than about twenty molar per cent for the sake of the preparation of a soft resin. The content of vinyl ether in the copolymers affects effectively the properties of copolymers, but the effect of the length of alkyl chain is not observed in present experiments.