Compatibilization of immiscible polymer blends (R-PET/PP) by adding PP-g-MA as compatibilizer: analysis of phase morphol
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Compatibilization of immiscible polymer blends (R‑PET/ PP) by adding PP‑g‑MA as compatibilizer: analysis of phase morphology and mechanical properties Majid Ahmadlouydarab1 · Mahyodin Chamkouri2 · Hossein Chamkouri2 Received: 16 August 2019 / Revised: 3 December 2019 / Accepted: 4 December 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract In the current study, the compatibilization of polypropylene/recycled polyethylene terephthalate (PP/r-PET) blends with different percentages of maleic anhydride (PP-g-MA) was examined. Exploited resource for r-PET was used as water bottles. Specimens of PP/r-PET blends in different percentages, i.e., 90/10, 70/30, and 50/50 were prepared in a corotating twin-screw extruder to evaluate the mechanical properties. Results indicated that PP-g-MA improved compatibilization of the PP/r-PET blends (modulus of elasticity and yield stress were enhanced to about 1450 MPa and 30 MPa) and also enhanced the morphological and mechanical properties. By adding about 2% of the compatibilizer into specimens containing 10% of r-PET, the highest enhancement in mechanical properties was achieved. Besides, both yield strength and the impact of energy were improved 8.3% and 24.6% by increasing the amount of 50% and 10% r-PET in the system. Also, results showed that specimens have higher yield stress and modulus of elasticity after 10 days compared to those specimens without aging due to the presence of stronger interaction after a period of time. Keywords Compatibilizer · Maleic anhydride-grafted polypropylene · Polypropylene · Recycled polyethylene terephthalate
Introduction Polymer blending is one of the most important and rapidly growing sectors of polymer engineering and is an economical method to produce new engineering materials as indicated by a large number of versatile polymer blends available in the market and * Majid Ahmadlouydarab [email protected] 1
Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran
2
Danesh Paper Company, Tehran, Iran
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Polymer Bulletin
number of patents of polymer blends registered annually [1–3]. Recently, the immiscible polymer blends have attracted great attention. Numerous studies have been focused on polymer blends containing compatibilizer to modify interfacial bonding and mechanical properties [4–7]. Immiscibility in the polymers blends leads to poor interfacial bonding and poor physical and mechanical properties. This problem describes why interaction between phases has been a major topic for researchers in the last decade [8, 9]. One way to improve the compatibility of immiscible polymeric blends is by utilizing graft or block copolymers as compatibilizers to improve the interfacial activity by reinforcing the interface. However, the major problem of this strategy is the highly controlled processability of graft copolymers used widely [10–14]. Polyethylene terephthalate (PET) has wide applications in the packaging industry especially food packaging and in bottl
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