Effect of screw speed, drawing ratio and PET concentration on the properties of PET/PP blends

I. Gokgoz Erkoc*, T. Guven, F. Yildirim, M. Sözer, F. Güner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The objective of this study is to investigate the influence of screw speed, drawing ratio and composition of blend on the morphology and the mechanical properties of extruded and drawn PET/PP blends. Samples were generated by a two-step process. Firstly, PET was dispersed in PP matrix at different extrusion screw speeds in order to determine optimum mixing condition, and then extrudates were stretched by a take up device. Final morphology and mechanical properties of the samples were examined using scanning electron microscopy, dynamic mechanical analysis, and a universal testing machine. The results showed that low screw speeds were not enough to distribute PET droplets homogeneously inside the matrix. With increasing of the screw speed more homogeneous phase morphology was obtained but further increase caused to agglomeration of PET droplets. Scanning electron microscopy images also showed that with increasing of draw ratio PET droplets changed from spherical to rod-like shape, and finally to microfibrils in matrix. It was also found that with increasing of concentration of PET and draw ratio, mechanical properties increased up to 6-7 times compared to non-oriented samples.

Original languageEnglish
Pages (from-to)442-446
Number of pages5
JournalActa Physica Polonica A
Volume134
Issue number1
DOIs
Publication statusPublished - Jul 2018

Bibliographical note

Publisher Copyright:
© 2018 Polish Academy of Sciences Institute of Physics. All rights reserved.

Funding

Some parts of this study was realized at Akron University Laboratories, so the authors gratefully acknowledge the Scientific and Technical Research Council of Turkey (TUBITAK) to provide international research scholarship with 2214-A program (1059B141400691) and Professor Mukerrem Cakmak for valuable supports. The authors would like to thank also MIR R&D Co.Ltd. for production and material support and ITU MEMTEK for SEM measurements.

FundersFunder number
Akron University Laboratories
TUBITAK1059B141400691
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

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