Effect of Molecular Weight and Annealing Treatment on Mechanical and Thermal Properties of Polycarbonate

被引：0
作者：
Xu X. [1 ,3 ]
Wang T. [2 ,3 ]
Sun Q. [2 ,3 ]
Wang B. [2 ,3 ]
Ge Y. [2 ,3 ]
Lang J. [2 ,3 ]
Yan Y. [2 ,3 ]
机构：
[1] Beijing Institute of Aeronautical Materials, Beijing
[2] Baimtec Material Co., LTD, Beijing
[3] Beijing Engineering Research Center of Advanced Structural Transparence for the Modern Traffic System, Beijing
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2024年 / 40卷 / 01期
关键词：
annealing treatment; mechanical properties; molecular weight; polycarbonate;
D O I：
10.16865/j.cnki.1000-7555.2024.0009
中图分类号：
学科分类号：
摘要：
The mechanical and thermal properties of polycarbonate with different molecular weight and injection molding annealing heat treatment time were studied, and the reasons for the influence of molecular weight and annealing on the properties were analyzed. The results show that the high molecular weight polycarbonate has better tensile fracture resistance and impact performance without annealing. Low molecular weight and annealing heat treatment can improve the tensile yield stress and bending properties. The photoelastic analysis of impact samples shows that high molecular weight unannealed polycarbonate has high residual stress, large degree of entanglement, plastic deformation after impact and high impact toughness. Through dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC), it is found that as the molecular weight increases, the glass transition temperature increases and the chain motion tends to be more elastic. © 2024 Sichuan University. All rights reserved.
引用
收藏
页码：92 / 99
页数：7
相关论文
共 10 条
  • [1] Bian Y L, Liu Q, Feng Z D, Et al., High- speed penetration dynamics of polycarbonate, International Journal of Mechanical Sciences, 223, (2022)
  • [2] Ullrich F, Singh S P V, McDonald S, Et al., Effect of strain rate on the mechanical properties of polycarbonate processed by compression and injection molding, Polymer Engineering & Science, 62, pp. 174-184, (2021)
  • [3] Redjala S, Azem S, Ait Hocine N., The effect of the thermal aging on polycarbonate, Materials Today: Proceedings, 47, pp. 3073-3076, (2021)
  • [4] Zhang Z, Zhang L, Jasa J, Et al., Molecular sources of ratcheting in poly- dispersed polycarbonate, International Journal of Fatigue, 154, (2022)
  • [5] Diawara B, Fatyeyeva K, Chappey C, Et al., Evolution of mechanical and barrier properties of thermally aged polycarbonate films, Journal of Membrane Science, 607, (2020)
  • [6] Nishitsuji S, Watanabe Y, Ito H, Et al., Molecular weight dependence of the physical aging of polycarbonate, Polymer, 178, (2019)
  • [7] Umeno Y, Kubo A, Albina J M., Coarse- grained molecular dynamics simulation of deformation and fracture in polycarbonate: effect of molar mass and entanglement, Theoretical and Applied Fracture Mechanics, 109, (2020)
  • [8] Ge Y, Xiang N, Wang B L, Et al., Effect of heat treatment after injection molding on the properties of polycarbonate, Polymer Materials Science & Engineering, 35, 9, pp. 89-94, (2019)
  • [9] Ge Y, Wang B L, Xiang N, Et al., Residual stress analysis in cross section of optical parts by co- injection molding, Journal of Materials Engineering, 48, 10, pp. 88-95, (2020)
  • [10] Fox T G, Flory P J., Second- order transition temperatures and related properties of polystyrene. I. Influence of molecular weight, Journal of Applied Physics, 21, pp. 581-591, (1950)
1