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Effect of polyvinyl acetate on the properties of biodegradable thermoplastic starch/polyethylene glycol blends

  • Wenxi Cheng EMAIL logo , Wei Miao , Wentao Li , Zhiwei Jiang , Weiqiang Song , Haowei Lin , Mengya Shang , Yike Zhang and Bo Cheng
Published/Copyright: February 14, 2025
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International Polymer Processing
From the journal International Polymer Processing Volume 40 Issue 2

Abstract

Thermoplastic starch (TPS)/polyethylene glycol (PEG)/polyvinyl acetate (PVAc) blends were prepared through melt blending, in which PEG content was fixed at 5 wt% and PVAc content ranged from 10 wt% to 20 wt%, with increments of 5 wt%. For comparison, a TPS/PEG blend was also prepared. All the blends were subsequently characterized using various techniques. Differential scanning calorimetry (DSC) results showed that the melt temperatures (Tm) of TPS and PEG in all blends remained independent, indicating immiscibility of TPS and PEG. Notably, Tm of TPS weakened upon the addition of PVAc, and the effect was particularly pronounced in the blend containing 15 wt% PVAc, whose Tm disappeared and a cold crystallization temperature (Tcc) emerged, suggesting a crystal hindering effect exerted by PVAc on TPS. X-ray diffraction (XRD) results further supported this finding, showing that PVAc primarily inhibited the formation of VA-type crystals in TPS and slightly increased starch retrogradation. Scanning electron microscopy (SEM) images revealed that starch plasticization increased with higher PVAc content, and TPS particles agglomerated into larger nodules. Tensile testing demonstrated that the ternary blends exhibited enhanced strength, while PEG did not contribute to the toughness of the system. Additionally, the thermal resistance, equilibrium moisture adsorption, and biodegradation stability of the ternary blends improved with the incorporation of PVAc. It is evident that in TPS/PEG/PVAc ternary blends, PVAc retained its reinforcing and crystallinity-reducing effect, whereas the toughening effect of PEG was absent.

Keywords: thermoplastic starch; polyvinyl acetate; polyethylene glycol; crystal; reinforce; toughen
Corresponding author: Wenxi Cheng, School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China, E-mail:

Funding source: Henan Province Science and Technology Research Project

Award Identifier / Grant number: 232102230097

Funding source: CAS Henan Industrial Technology Innovation & Incubation Center

Award Identifier / Grant number: 2024116

  1. Research ethics: Not applicable.

  2. Informed consent: Not applicable.

  3. Author contributions: Wenxi Cheng: funding acquisition, conceptualization, methodology, writing - review & editing. Wei Miao: methodology, investigation, project administration, writing - review & editing. Wentao Li: formal analysis, investigation, data curation, writing – original draft. Zhiwei Jiang: methodology, funding acquisition, resources. Weiqiang Song: software, formal analysis, writing - review & editing. Haowei Lin: methodology, supervision, data curation, formal analysis. Mengya Shang: methodology, supervision, formal analysis. Yike Zhang: investigation, data curation, validation, writing – original draft. Bo Cheng: validation, formal analysis. The authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interest: The authors state no conflict of interest.

  6. Research funding: Henan Province Science and Technology Research Project [grant number 232102230097] and CAS Henan Industrial Technology Innovation & Incubation Center [grant number 2024116].

  7. Data availability: The raw data can be obtained on request from the corresponding author.

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Supplementary Material

This article contains supplementary material (https://doi.org/10.1515/ipp-2024-0116).

Received: 2024-08-30
Accepted: 2024-12-29
Published Online: 2025-02-14
Published in Print: 2025-05-26

© 2025 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ipp-2024-0116
Keywords for this article
thermoplastic starch; polyvinyl acetate; polyethylene glycol; crystal; reinforce; toughen

Articles in the same Issue

  1. Frontmatter
  2. Review Article
  3. Corrosion resistive conducting polymeric nanocomposite-based coatings on steel: a mechanistic insight
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  5. Effect of compatibilizer type on the properties of thermoplastic elastomers based on recycled polyethylene at high ground tire rubber content
  6. Analyzing the effects of solid fraction and heat treatment on the mechanical properties of 3D printed polymer lattices
  7. Effect of polyvinyl acetate on the properties of biodegradable thermoplastic starch/polyethylene glycol blends
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