Thin-walled plates of polypropylene (PP), PP/acrylonitrile–styrene copolymer (SAN) blend,and PP/SAN/halloysite nanotubes (HNTs) blend nanocomposite were molded via microinjection-compression molding (μ-ICM). Hierarchical crystal morphologies were observed for the three plates. The SAN appeared mainly as microfibers in μ-ICM plates of PP/SAN blend and PP/SAN/HNTs blend nanocomposite, facilitating the formation of atranscrystals-dominated layer between shear and core layers in each of the two plates. Moreover, the SAN microfibers and HNTs synergetically increased the crystallinity of the PP. Tensile strength and microhardness of the PP plates were enhanced in the presence of SAN microfibers and HNTs.
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Wang et al. (2015) studied this question.
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