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Comb-like copolymer dispersant for PP/CaCO3 composites: effects of particle concentration on properties of composites

  • Xiwei Jing , Weiguang Gong EMAIL logo , Zhongjun Feng , Xin Meng and Baicun Zheng
Published/Copyright: December 15, 2016
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 37 Issue 6

Abstract

A comb-like copolymer poly (styrene-co-maleic anhydride)-graft-poly (ε-caprolacton) (SMA-g-PCL, SP) with carboxyl group as an anchoring group and polycaprolactone as a solvent chain was used as an effective dispersant for CaCO3 in the polypropylene (PP) matrix. The effects of CaCO3 concentration on crystallization behaviors, mechanical properties, and thermal stabilities were studied systematically. The results revealed that the dispersion of CaCO3 in the PP matrix was markedly improved owing to the steric hindrance effect caused by PCL, and the SP-coated CaCO3 was a very effective nucleating agent for PP. Proper CaCO3 concentration corresponded to the improvement of crystallization temperature, crystallinity, and crystallization rate of PP. There was only a slight improvement in yield stress but great improvement in Young’s modulus, flexural modulus, and impact strength. However, the excessive CaCO3 filler deteriorated the mechanical properties. The good dispersion of SP-coated CaCO3 in the PP matrix also accounted for the improvement of thermal stability. The initial decomposition temperature of the PP/CaCO3 composite with 7.4 wt.% CaCO3 increased 35°C compared with neat PP.

Keywords: CaCO3 concentration; comb-like copolymer dispersant; crystallization; mechanical properties; thermal stabilities

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Received: 2016-8-9
Accepted: 2016-9-20
Published Online: 2016-12-15
Published in Print: 2017-7-26

©2017 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/polyeng-2016-0290
Keywords for this article
CaCO3 concentration; comb-like copolymer dispersant; crystallization; mechanical properties; thermal stabilities

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Effect of the variation of the gating system on the magnetic properties of injection molded pole-oriented rings
  4. Effect of graphite and silicon carbide fillers on mechanical properties of PA6 polymer composites
  5. Mechanical properties, thermal and crystallization behavior of different surface-modified silica nanoparticle-filled PA66 composites
  6. Thermal characterization of reactive blending of 70PC/30PET mixtures prepared in the presence/absence of samarium acetylacetonate as a transesterification catalyst
  7. Understanding the interactive effects of material parameters governing the printer toner properties: a response surface study
  8. Quest for electroconducting structural polymers: CNTs/Polybond nanocomposites with improved electrical and mechanical properties
  9. Comb-like copolymer dispersant for PP/CaCO3 composites: effects of particle concentration on properties of composites
  10. Study of PVAc-PMMA-LiCl polymer blend electrolyte and the effect of plasticizer ethylene carbonate and nanofiller titania on PVAc-PMMA-LiCl polymer blend electrolyte
  11. Mechanical performances of hygrothermally conditioned CNT/epoxy composites using seawater
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