Abstract
AbstractCopolymers of vinyl formate containing various amounts of vinyl stearate were prepared by mass polymerization at 30°C. in the presence of small amounts of isopropanol. A study of the molecular weights and the viscosity properties of these copolymers indicated that they have high degrees of polymerization and are little branched. A study of the x‐ray diffraction patterns of the copolymers of vinyl alcohol and vinyl stearate indicated that the alcohol and stearate segments crystallize in separate lattices. The tensile strength of vinyl alcohol copolymers decreased as the vinyl stearate content increased and as their water content increased. When the samples were dried or were oriented, their tensile strengths increased. Copolymers of vinyl alcohol containing as little as 1.5 mole‐% of vinyl stearate had greatly improved resistance to water and were insoluble in water at 98°C.
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