塑料科技2025，Vol.53Issue(8)：39-42,4.DOI:10.15925/j.cnki.issn1005-3360.2025.08.008
聚乳酸3D打印线材松弛时间谱分析
Analysis on Relaxation Time Spectrum of Polylactic Acid Filaments for 3D Printing
韦莉 1张梦瑶 1刘蕾1
作者信息
- 1. 东华大学先进低维材料中心,上海 201620
- 折叠
摘要
Abstract
3D-printed polymer materials undergo aging in thermal environments,leading to a degradation of mechanical properties and subsequent structural failure.The study focuses on polylactic acid(PLA)3D-printed filaments,aiming to establish a method for evaluating the long-term mechanical performance of the material under specific temperatures.Dynamic mechanical analysis(DMA)was first employed to obtain the characteristic curves of the storage modulus of PLA samples under varying frequencies at different temperatures(45～65℃).Based on the time-temperature superposition principle,the master curve of the storage modulus at a reference temperature of 45℃was constructed.Furthermore,the generalized Maxwell model was applied to fit and derive the material's relaxation time spectrum.The results indicate that the relaxation modulus of PLA samples exhibits a significant time-dependent decay characteristic.At 45℃,the modulus decreases to approximately 5 MPa after 15 months.This combined experimental and theoretical approach provides a methodological reference for assessing the long-term mechanical performance of additive manufacturing materials under specific temperatures.关键词
动态热机械分析/聚乳酸/时温等效/广义Maxwell模型Key words
Dynamic mechanical analysis/PLA/Time-temperature superposition principle/Generalized Maxwell model分类
化学化工引用本文复制引用
韦莉,张梦瑶,刘蕾..聚乳酸3D打印线材松弛时间谱分析[J].塑料科技,2025,53(8):39-42,4.
