# The effect of montmorillonite modification on crystallization behaviour of polypropylene/montmorillonite composites

> Title: The effect of montmorillonite modification on crystallization behaviour of polypropylene/montmorillonite composites Page Range: p.331-340 Author(s): Zhihong Yang; Minghu Wu; Gang Chen; Shengjuan Li; Panpan Peng; Qiaolian Zhang File size: Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal: Polymers and...

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Published: 2016-05-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: The effect of montmorillonite modification on crystallization behaviour of polypropylene/montmorillonite composites**
 Page Range: p.331-340
 Author(s): Zhihong Yang; Minghu Wu; Gang Chen; Shengjuan Li; Panpan Peng; Qiaolian Zhang
 File size:
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc24-5&JournalID=102745&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 24
 Issue No: No.5

**Abstract**
 This paper reports the preparation of organic montmorillonite (OMMT) modified by octadecylamine and polypropylene/montmorillonite (PP/MMT) composites produced by the method of melt compounding. The effect of MMT modification degree on the crystallisation behaviour of PP was emphasised by X-ray diffraction (XRD), polarising optical microscopy and differential scanning calorimetry (DSC). Interlayer d-spacings of 3.02 nm, 1.27 nm and 2.59 nm were detected for MMT modified by octadecylamine, Titivate coupling agent and commercial OMMT, respectively. The spherulite size and the crystallinity of the composite decreased and the number of spherulites increased with the interlayer spacing of OMMT. The values of t1/2 and F(T) for PP crystallisation decreased with the interlayer spacing at a given cooling rate or a given relative crystallinity degree, indicating that MMT with a larger gallery height could accelerate the crystallisation rate of PP more efficiently. Moreover, the composites containing OMMT modified by octadecylamine exhibited better mechanical properties in comparison to those incorporating OMMT modified by Titivate coupling agent and commercial OMMT, indicating that primary amine was one of the best potential surfactants for MMT modification. It was concluded that full modification of OMMT by octadecylamine was more beneficial to the crystallisation of PP and hence caused a positive effect on the mechanical properties of the composites. 42 Refs.

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