Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams <italic style="font-style: italic">via</italic> Microcellular Injection Molding with Self-Assembly Nucleating Agent

Xiao-Hu Bing; Wen-Yu Ma; Ming-Hui Wu; Peng Gao; Xiao Zhou; Hai-Bin Luo; Long Wang; Wen-Ge Zheng

doi:10.1007/s10118-024-3088-6

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Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent

RESEARCH ARTICLE | Updated：2024-05-11

- Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent
- Chinese Journal of Polymer Science Vol. 42, Issue 6, Pages: 739-750(2024)
- Affiliations：
  
  a.School of materials Science and Engineering, Shanghai University, Shanghai 200444, China
  b.Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
  c.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  wanglong@nimte.ac.cn (L.W.)
  wgzheng@nimte.ac.cn (W.G.Z.)
- Funds：
- DOI：10.1007/s10118-024-3088-6
  CLC：
- Published：1 June 2024，
  
  Published Online：28 February 2024，
  
  Received：17 November 2023，
  
  Revised：6 December 2023，
  
  Accepted：25 December 2023
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Bing, X. H.; Ma, W. Y.; Wu, M. H.; Gao, P.; Zhou, X.; Luo, H. B.; Wang, L.; Zheng, W. G. Lightweight, strong and high heat-resistant poly(lactide acid) foams via microcellular injection molding with self-assembly nucleating agent. Chinese J. Polym. Sci. 2024, 42, 739–750

Xiao-Hu Bing, Wen-Yu Ma, Ming-Hui Wu, et al. Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent. [J]. Chinese Journal of Polymer Science 42(6):739-750(2024)
Bing, X. H.; Ma, W. Y.; Wu, M. H.; Gao, P.; Zhou, X.; Luo, H. B.; Wang, L.; Zheng, W. G. Lightweight, strong and high heat-resistant poly(lactide acid) foams via microcellular injection molding with self-assembly nucleating agent. Chinese J. Polym. Sci. 2024, 42, 739–750 DOI： 10.1007/s10118-024-3088-6.

Xiao-Hu Bing, Wen-Yu Ma, Ming-Hui Wu, et al. Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent. [J]. Chinese Journal of Polymer Science 42(6):739-750(2024) DOI： 10.1007/s10118-024-3088-6.

摘要

Microcellular PLA foam was fabricated through a core-back microcellular injection molding technique with the addition of HNA. The obtained PLA/HNA blend foam displayed a crystallinity as high as 55.7%. The tensile toughness of PLA blend foams demonstrated a remarkable improvement of 463%. The PLA/HNA blend foam demonstrated exceptional thermal resistance.

Abstract

Poly(lactide acid) (PLA) foams have shown considerable promise as eco-friendly alternatives to nondegradable plastic foams

such as polystyrene (PS) foams. Nevertheless

PLA foam typically suffers from low heat-resistance and poor cellular structure stemming from its inherent slow crystallization rate and low melt strength. In this study

a high-performance PLA foam with well-defined cell morphology

exceptional strength and enhanced heat-resistance was successfully fabricated

via

a core-back microcellular injection molding (MIM) process. Differential scanning calorimetry (DSC) results revealed that the added hydrazine-based nucleating agent (HNA) significantly increased the crystallization temperature and accelerated the crystallization process of PLA. Remarkably

the addition of a 1.5 wt% of HNA led to a significant reduction in PLA’s cell size

from 43.5 μm to 2.87 μm

and a remarkable increase in cell density

from 1.08×10

cells/cm

to 2.15×10

cells/cm

. This enhancement resulted in a final crystallinity of approximately 55.7% for the PLA blend foam

a marked improvement compared to the pure PLA foam. Furthermore

at 1.5 wt% HNA concentration

the tensile strength and tensile toughness of PLA blend foams demonstrated remarkable improvements of 136% and 463%

respectively. Additionally

the Vicat softening temperature of PLA blend foam increased significantly to 134.8 °C

whereas the pure PLA foam exhibited only about 59.7 °C. These findings underscore the potential for the preparation of lightweight injection-molded PLA foam with enhanced toughness and heat-resistance

which offers a viable approach for the production of high-performance PLA foams suitable for large-scale applications.

关键词

Keywords

Poly(lactide acid)Nucleating agentMicrocellular injection moldingHeat-resistanceToughness

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⁰

Lightweight, Strong and High Heat-Resistant Poly(lactide acid) Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent

DOI：10.1007/s10118-024-3088-6

摘要

Abstract

关键词

Keywords

references