Recycled poly(ethylene terephthalate)/polypropylene/wollastonite composites using PP-<i>g</i>-MA as compatibilizer: Mechanical, thermal and morphological properties

Authors

  • P. Chaiwutthinan MTEC, National Science and Technology Development Agency (NSTDA)
  • S. Suwannachot Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi
  • A. Larpkasemsuk Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi

Keywords:

Recycled PET, Polypropylene, PP-g-MA, Wollastonite, Mechanical properties, Morphology, Thermal behaviors

Abstract

Polymers investigated in this study were recycled poly(ethylene terephthalate) (rPET) as a major phase (matrix) and virgin polypropylene (PP) as a minor phase (dispersed phase). Initially, rPET was melt mixed with four different PP contents (10–40 wt%) on a co-rotating twin screw extruder and then injection molded. The blend at 30 wt% PP exhibited the highest impact strength and elongation at break and an acceptable tensile strength and Young’s modulus. The 70/30 (w/w) rPET/PP blend was then upgraded its compatibility using 1–7 parts by weight per hundred of blend resin (phr) of maleic anhydride grafted PP (PP-g-MA). Among the compatibilized blends, that with 3 phr PP-g-MA imparted the highest impact strength and elongation at break owing to the better phase interaction. Therefore, the 70/30/3 (w/w/phr) rPET/PP/PP-g-MA compatibilized blend was selected for preparing composites with 5–20 phr of ultrafine wollastonite (WLN) in order to widen its applications. The effects of WLN content on mechanical properties (impact and tensile tests), thermal behaviors (differential scanning calorimetry and heat distortion temperature (HDT)) and morphology (scanning electron microscopy) of the composites were then investigated. The results showed that the tensile strength, Young’s modulus and HDT of the composites were enhanced by up to 1.1-, 1.5- and 1.3-fold, respectively, over those of the neat compatibilized blend in a WLN-dose-dependent manner, whereas the impact strength and elongation at break only decreased slightly. This finding was due to the high aspect ratio, stiffness and thermal resistance of the WLN.

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References

M. Kuzmanović, L. Delva, L. Cardon, and K. Ragaert, “The effects of injection molding temperature on the morphology and mechanical properties of PP/PET blends and microfibrillar composites,” Polymers, vol. 8, pp. 1–16, 2016.

S. Chuayjuljit, P. Chaiwutthinan, L. Raksaksri, and A. Boonmahitthisud, “Effects of poly (butylene adipate‐co‐terephthalate) and ultrafined wollastonite on the physical properties and crystallization of recycled poly(ethylene terephthalate),” Journal of Vinyl and Additive Technology, vol. 23, pp. 106–116, 2015.

L. M. G. Guadagnini and A. R. Morales, “Compatibilization of recycled polypropylene and recycled poly(ethylene terephthalate) blends with SEBS-g-MA,” Polimeros, vol. 28, pp. 84–91, 2018.

J. H. Lee, K. S. Lim, W. G. Hahm, and S. H. Kim, “Properties of recycled and virgin poly(ethylene terephthalate) blend fibers,” Journal of Applied Polymer Science, vol. 128, pp. 1250–1256, 2013.

I. Acar, A. kaşgőz, S. Őzgűműs, and M. Orbay, “Modification of waste poly(ethylene terephthalate) (PET) by using poly(L-lactic acid) (PLA) and hydrolytic stability,” PolymerPlastics Technology and Engineering, vol. 45, pp. 351–359, 2006.

X. Luo and Y. Li, “Synthesis and Characterization of Polyols and Polyurethane Foams from PET Waste and Crude Glycerol,” Journal of Polymers and the Environment, vol. 22, pp. 318-328, 2014.

L. Tan, Y. Chen, W. Zhou, F. Li, L. Chen, and X. He, “Preparation and biodegradation of copolyesters based on poly(ethylene terephthalate) and poly(ethylene glycol)/oligo (lactic acid) by transesterification,” Polymer Engineering and Science, vol. 50, pp. 76–83, 2010.

S. K. Najafi, “Use of recycled plastics in wood plastic composites – A review,” Waste Management, vol. 33, pp.188–1905, 2013.

F. Awaja and D. Pavel, “Recycling of PET,” European Polymer Journal, vol. 41, pp. 1453–1477,

S. Mbarek and M. Jaziri, “Recycling poly (ethylene terephthalate) waste: properties of poly(ethylene terephthalate)/polycarbonate blends and the effect of a transesterification catalyst,” Polymer Engineering and Science, vol. 46, pp. 1378–1386, 2006.

N. Kerboua, N. Cinausero, T. Sadoun, and J. M. Lopez-Cuesta, “Effect of organoclay in an immiscible poly(ethylene terephthalate) waste/ poly(methyl methacrylate) blend,” Journal of Applied Polymer Science, vol. 117, pp.129– 137, 2010.

N. M. L. Mondadori, R. C. R. Nunes, L. B. Canto, and A. J. Zattera, “Composites of recycled PET reinforced with short glass fiber,” Thermoplastic Composite Materials, vol. 25, pp. 747–764, 2011.

Y. Srithep, A. Javadi, S. Pilla, L. S. Turng, S. Gong, C. Clemons, and J. Peng, “Processing and characterization of recycled poly(ethylene terephthalate) blends with chain extenders, thermoplastic elastomer, and/or poly(butylene adipate-co-terephthalate),” Polymer Engineering and Science, vol. 51, pp. 1023–1032, 2011.

M. T. M. Bizarria, A. L. F. M. Giraldi, C. M. Carvalho, J. I. Velasco, M. A. d'Avia, and L. H. I. Mei, “Morphology and thermomechanical properties of recycled PET-organoclay nanocomposites,” Journal of Applied Polymer Science, vol. 104, pp. 1839–1844, 2007.

K. P. Chaudhari and D. D. Kale, “Impact modification of waste PET by polyolefinic elastomer,” Polymer International, vol. 52, pp. 291–298, 2003.

Y. Zhang, H. Zhang, L. Ni, Q. Zhou, W. Guo, and C. Wu, “Characterization and mechanical properties of recycled poly(ethylene terephthalate) toughened by styrene-ethylene/butylenesstyrene elastomer,” Journal of Polymers and the Environment, vol. 18, pp. 647–653, 2010.

S. C. Chen, L. H. Zhang, G. Zhang, G. C. Zhang, J. Li, X. M. Zhang, and W. X. Chen, “An investigation and comparison of the blending of LDPE and PP with different intrinsic viscosities of PET,” Polymers, vol. 10, pp. 1–14, 2018.

O. Saravari, H. Waipunya, and S. Chuayjuljit “Effects of ethylene octene copolymer and ultrafine wollastonite on the properties and morphology of polypropylene-based composites,” Journal of Elastomers & Plastics, vol. 46, pp. 175–186, 2014.

S. Chuayjuljit, A. Larpkasemsuk, P. Chaiwutthinan, D. Pongkao Kashima, and A. Boonmahitthisud, “Effects of analcime zeolite synthesized from local pottery stone as nucleating agent on crystallization behaviors and mechanical properties of isotactic polypropylene,” Journal of Vinyl & Additive Technology, vol. 24, pp. E85–E95, 2015.

C. P. Papadopoulou and N. K. Kalfoglou, “Comparison of compatibilizer effectiveness for PET/PP blends: their mechanical, thermal and morphology characteristic,” Polymer, vol 41, pp. 2543-2555, 2000.

A. S. Luyt, M. D. Dramicanin, Z. Antic, and V. Djokovic, “Morphology, mechanical and thermal properties of composites of polypropylene and nanostructures wollastonite filler,” Polymer Testing, vol. 28, pp. 348– 356, 2009.

www.imaeurope.eu./fileadmin/downloads/minerals/w ollastonite. November 2010.

S. Chongprakobkit, M. Opaprakasit, and S. Chuayjuljit, “Use of PP-g-MA prepared by solution process as compatibilizer in polypropylene/polyamide 6 blends,” Journal of Metals, Materials and Minerals, vol. 17, pp. 9–16, 2007.

Y. Lei, Q. Wu, and Q. Zhang, “Morphology and properties of microfibrillar composites based on recycled poly (ethylene terephthalate) and high density polyethylene,” Composites Part A: Applied Science and Manufacturing, vol. 40, pp. 904–912, 2009.

R. S. Chen, M. H. Ghani, M. N. Salleh, S. Ahmad, and S. Gan, “Influence of blend composition and compatibilizer on mechanical and morphological properties of recycled HDPE/PET blends,” Materials Sciences and Applications, vol. 5, pp. 943–952, 2014.

Y. Zhang, C. Yu, P. K. Chu, F. Lv, C. Zhang, J. Ji, R. Zhang, and H. Wang, “Mechanical and thermal properties of basalt fiber reinforced poly(butylene succinate) composites,” Materials Chemistry and Physics, vol. 1338, pp. 845–849, 2012.

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Published

2019-01-10

How to Cite

[1]
P. Chaiwutthinan, S. Suwannachot, and A. Larpkasemsuk, “Recycled poly(ethylene terephthalate)/polypropylene/wollastonite composites using PP-<i>g</i>-MA as compatibilizer: Mechanical, thermal and morphological properties”, J Met Mater Miner, vol. 28, no. 2, Jan. 2019.

Issue

Vol. 28 No. 2 (2018)

Section

Original Research Articles

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