Crystalline morphology and mechanical properties of isotactic polypropylene composites filled by wollastonite with β‐nucleating surface. Issue 8 (2nd December 2013)

• Record Type: Journal Article
• Authors: Ding, Qian; Zhang, Zishou; Dai, Xin; Li, Mei; Mai, Kancheng
• Is Part Of: Polymer composites. Volume 35:Issue 8(2014:Aug.)
• Page Start: 1445
• Page End: 1452
• Publication Date: 2013-12-02
• Subjects: Polymeric composites -- Periodicals; 620.192
• DOI: 10.1002/pc.22797
• Languages: English
• ISSNs: 0272-8397

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Wollastonite‐filled <italic>α</italic>‐isotactic polypropylene (iPP) and <italic>β</italic>‐iPP were prepared through introduction of wollastonite (W) and wollastonite with <italic>β</italic>‐nucleating surface (W<sub>x</sub>) in iPP matrix. The <italic>α</italic>‐ and <italic>β</italic>‐nucleating ability of wollastonite, crystalline morphology, and mechanical properties of injected iPP filled by wollastonite with different nucleating surface were compared using differential scanning calorimetry, wide‐angle X‐ray diffraction, polarizing optical microscopy, mechanical testing, and scanning electron microscopy. The results indicated that iPP filled by wollastonite with different nucleating surface has different crystalline morphology, melting behavior, and mechanical properties. The W and W<sub>x</sub> filled iPP mainly formed <italic>α</italic>‐ and <italic>β</italic>‐phase iPP, respectively. The tensile and flexural modulus of iPP/W and iPP/W<sub>x</sub> increased with increasing wollastonite content, and the tensile and flexural modulus of iPP/W<sub>x</sub> were lower than that of iPP/W. The tensile property, flexural property, and impact strength of iPP/W<sub>x</sub> were higher than that of iPP/W and <italic>β</italic>‐iPP. The synergistic effect of reinforcing of wollastonite and toughening of <italic>β</italic>‐phase leads to higher mechanical properties. POLYM. COMPOS., 35:1445–1452, 2014. © 2013 Society of Plastics Engineers</p> </abstract>