Recent Progress on Sintering Molding of Polymers

Dong-yu BAI; Hong-wei BAI; Qiang FU

doi:10.14028/j.cnki.1003-3726.2017.10.002

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Recent Progress on Sintering Molding of Polymers

更新时间：2022-09-06

- Recent Progress on Sintering Molding of Polymers
- Polymer Bulletin Vol. 30, Issue 10, Pages: 13-22(2017)
- 作者机构：
  
  四川大学高分子科学与工程学院，高分子材料工程国家重点实验室，成都 610065
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2017.10.002
  CLC：
- Published：01 October 2017，
  
  Received：12 July 2017，
  
  Revised：24 July 2017，
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Dong-yu BAI, Hong-wei BAI, Qiang FU. Recent Progress on Sintering Molding of Polymers. [J]. Polymer Bulletin 30(10):13-22(2017)
DOI：

Dong-yu BAI, Hong-wei BAI, Qiang FU. Recent Progress on Sintering Molding of Polymers. [J]. Polymer Bulletin 30(10):13-22(2017) DOI： 10.14028/j.cnki.1003-3726.2017.10.002.

摘要

高分子材料烧结成型是借鉴粉末冶金技术而形成的一种特殊的成型加工方法，特别适合熔体粘度极大、高温易分解的高分子材料的成型加工。传统高分子材料的烧结成型温度在熔点以上，通过粉末的熔融和界面扩散将粉末烧结在一起。本文首先对聚四氟乙烯和超高分子量聚乙烯这两种常用于烧结成型的高分子材料的烧结成型工艺条件、成型机理及其多功能材料的制备等方面进行了系统的介绍；最后，重点分析了我们组最近针对立构复合型聚乳酸熔融稳定性差、熔融加工易降解的问题而提出的一种低温（低于立构复合晶体熔点）烧结成型新方法，即通过在粉末表面形成新立构复合晶体将粉末烧结在一起，并对其研究进展进行了综述。

Abstract

Inspired by powder metallurgy

sintering molding method has been developed to processing polymers with extremetly high melt viscosity and low degradation temperature. The polymer sintering is generally carried out by powder melting and chain diffusion

and the sintering temperature is above the melting temperature of the polymers. In this review

sintering conditions and sintering mechanism involved in the sintering of polytetrafluoroethylene (PTFE) and ultra high molecular weight polyethylene (UHMWPE) are systematically introduced. Moreover

the application of the sintering technology in the fabrication of multifunctional materials are also discussed. Most importantly

in order to overcome the poor melt stability as well as serious degradation of stereocomplexed polylactide (SC-PLA) after complete melting

our research group proposed a novel low-temperature (lower than the melting temperature stereocomplex (SC) crystallite) sintering technology for SC-PLA. During the sintering process

the powdery SC-PLA particles are welded by the formation of new SC crystallite at the interface. The research progress are also highlighted.

关键词

烧结成型聚乳酸立构复合聚四氟乙烯超高分子量聚乙烯

Keywords

SinteringPolylactideStereocomplexPolytetrafluoroethyleneUltra high molecular weight polyethylene

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