Abstract
A PC/PE(20/80) blend was molded by gas-assisted injection molding and, after being etched, its crystalline morphology was investigated. Microscopy results indicate that transcrystallinity is favorably formed on the surface of the thinner PC fibrils. However, transcrystallinity cannot be observed on the PC droplets' surface. In addition, in the non-isothermal crystallization process, there was no transcrystallinity formed around the PC fibrils under the condition without shear. Combining the characteristics of gas-assisted injection molding and the PC droplet's deformation, the transcrystallization origin is proposed to be the local shear stress, which is brought by the relative motion of the two components during PC droplet's deformation and solidification.
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