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Journal of Polymer Research
Erschienen in: Journal of Polymer Research 2/2016

01.02.2016 | Original Paper

Flow-induced β-crystal of iPP in microinjection molding: effects of addition of UHMWPE and the processing parameters

verfasst von: Qianying Chen, Zhang Xiang, Qi Yang, Miqiu Kong, Yajiang Huang, Xia Liao, Yanhua Niu, Zhongguo Zhao

Erschienen in: Journal of Polymer Research | Ausgabe 2/2016

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Abstract

The flow-induced β-crystal of isotactic polypropylene (iPP) with addition of ultrahigh molecular weight polyethylene (UHMWPE) molded by microinjection and influences of processing parameters on the formation of β-crystal in iPP/UHMWPE microparts were investigated by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and scanning electron microscopy (SEM). It was found that the contents and the dispersion of UHMWE affect the formation of β-crystal in iPP/UHMWPE blend. With the addition of UHMWPE, Kβ values of the blends increased significantly compared with that of the pure iPP and reached the maximum at the content of 2 wt% UHMWPE. In addition, a better dispersion of UHMWPE can facilitate the formation of the β-crystal in the iPP/UHMWPE. The results showed that the thermal stability of the β-crystal was enhanced with increasing the mold temperature. When the mold temperature was increased from 60 to 120 °C, the β-crystal become more perfect. High injection speeds can promote the formation of the β-crystal, but the value of the injection speed must be within a certain range.
Vorheriger Artikel Simultaneously reinforcing and toughening plasticized starch film via regenerated cellulose as reinforcing phase
Nächster Artikel Largely enhanced effective porosity of uniaxial stretched polypropylene membrane achieved by pore-forming agent

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Metadaten
Titel
Flow-induced β-crystal of iPP in microinjection molding: effects of addition of UHMWPE and the processing parameters
verfasst von
Qianying Chen
Zhang Xiang
Qi Yang
Miqiu Kong
Yajiang Huang
Xia Liao
Yanhua Niu
Zhongguo Zhao
Publikationsdatum
01.02.2016
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 2/2016
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-015-0910-4

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