Suppression of β-crystal in iPP/PET Fiber Composites

• Published in: Polymer-plastics technology and engineering Vol. 49; no. 2; pp. 154 - 157
• Main Authors: Zheng, Guoqiang, Qi, Yongfeng, Liu, Chuntai, Shen, Changyu, Chen, Jingbo, Li, Qian, Peng, Xiangfang
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 27.01.2010; Taylor & Francis
• Subjects: Applied sciences; crystal; Exact sciences and technology; Fibers and threads; Forms of application and semi-finished materials; Heterogeneous nucleation; PET fiber; Polymer industry, paints, wood; Polypropylene; Technology of polymers; Ethylene terephthalate polymer; Polymer blends; PET fiber; Propylene polymer; Ester polymer; Synthetic fiber; Heterogeneous nucleation; Experimental study; Structure composition relationship; Melt crystallization; Beta form; Polypropylene; Isotactic polymer; Olefin polymer; Crystal morphology; β-crystal
• ISSN: 0360-2559; 1525-6111
• DOI: 10.1080/03602550903284214

The β -crystal formed in PP/PET fiber composites was investigated. The results indicate that PET fibers (PF) can preferably lead to α -crystal formation on their surface. Besides, α -crystals occur earlier than those in the bulk. The β -crystal, might be induced by temperature gradient, only formed away from the PF in composites with lower content of PF. The higher the content of PF is, more possible the PF network is constructed. The transcrystallinity induced by PF will rapidly occupy the region between the adjacent PFs. Consequently, owing to the spatial confinement, β -form is suppressed in the composites with higher content of PF.