Abstract
The effects of calcium salts of aliphatic dicarboxylic acids on the polymorphism of iPP have been investigated by means of WAXD, DSC and PLM. It is found that β crystalline form content and nucleation ability of the nucleated iPP are dependent on the carboatomic numbers of the acids. Calcium salts of malonic acid, glutaric acid, pimelic acid and suberic acid are good β nucleators. Calcium salts of succinic acid and adipic acid are α nucleators. Calcium salts of acids with carboatomic numbers of 5 to 8 are good nucleators. The β spherulite size is the smallest in iPP doped with calcium pimelate.
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