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

• Published in: Kobunshi Kagaku Vol. 17; no. 185; pp. 558 - 561
• Main Authors: Akazome, Giichi, Sakai, Shizuyoshi, Choshi, Yasuo, Murai, Koichi
• Format: Journal Article
• Language: Japanese
• Published: The Society of Polymer Science, Japan 25.09.1960
• ISSN: 0023-2556; 1884-8079
• DOI: 10.1295/koron1944.17.558

Vinylidene chloride is copolymerized with some higher alkyl (n-octyl-n-octadecyl) vinyl ethers at 50°C in the presence of benzoyl peroxide as an initiator. Monomer reactivity ratios of vinylidene chloride (M1) and each vinyl ether (M2) are found as follows: Vinyl octyl ether r1=1.35± 0.15, r2=0.0± 0.2; Vinyl dodecyl ether r1=1.30± 0.15, r2=0.0± 0.2; Vinyl octadecyl ether r1=1.50± 0.15, r2=0.0± 0.3. The rate of copolymerization and reduced viscosity of copolymers decrease as the concentration of vinyl ether in a monomer mixture increases, when the copolymerization proceeds to a higher conversion, the content of vinyl ether in polymer molecules increases, followed by a decrease in the reduced viscosity. From the measurements on the tensile strength, elongation, specific gravity and solubility in organic solvents of copolymers, the interplastisizing effect of higher alkyl vinyl ethers is evoluated. The effects of alkyl chain length of vinyl ethers also studied.