It was found that tough, continuous radiation polymers and copolymers of vinylchloride can be prepared if suitable plasticizers are used. Radiationcopolymers of styrene-acrylonitrile appear to be feasible for use in wood-plasticcomposites. Studies involving carbon tetrachloride as a promoter for theradiation polymerization of PMMA showed that important reductions inradiation requirements are possible. Many polymer dyes were found toaccentuate the wood grain while at the same time imparting attractive colorsto the wood. Data are presented which show that the dyes have inhibitoryeffects on the polymerization reaction and that such effects increase withdye concentration. However, at concentrations which are potentially usefulfor the wood-plastic combinations discussed here, the inhibition is notsufficient to give cause for concern. According to the authors, exploratorywork with radiation polymers and copolymers of formaldehyde strongly indicatethat such systems are not practical for use in wood- lastic combinations.(Author, modified-PL) ANNOTATION: Preparation of wood-plastic combinations using gamma radiation to induce polymerization.
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