## Abstract Vinyl esters of 4βketostearic acid, 9(10)βketostearic acid, and 12βketostearic acid have been homopolymerized and copolymerized with vinyl chloride. Reactivity ratios have been determined for the three vinyl ketostearates with vinyl acetate and vinylidine chloride. Also reactivity ratio
Some polymers and copolymers of vinyldiphenylphosphine
β Scribed by Paisley, David M. ;Marvel, C. S.
- Publisher
- John Wiley and Sons
- Year
- 1962
- Weight
- 286 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0022-3832
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β¦ Synopsis
Abstract
Vinyldiphenylphosphine has been homopolymerized with aluminumisobutyl/titanium tetrachloride catalysts and with boron fluoride etherate to give low molecular weight oily products. The same monomer has been copolymerized with ethylene and butadiene using Zieglerβtype catalysts and with styrene using azobisisobutyronitrile as the initiator. None of the polymers has a high molecular weight, as indicated by inherent viscosity determinations.
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Gradient polymers are two component polymeric systems in which the concentration of one component varies in a continuous way from one side to the other in systems with plane-parallel geometry. Such systems can be obtained from an amorphous polymeric matrix by diffusing into another monomer creating
Copolymers of the nematogenic monomer, p-(E-acryloyloxycaproyloxy)-p'-methoxyphenylbenzoate, with various cholesterol-containing monomers were synthesized. The copolymers were shown to form mesophases of the cholesteric type. The dependence of the selective reflection of light on copolymer compositi