在40℃、60℃、80℃和100℃的热水环境中，分别对Bayer-PC、Japan-PC、Korea-PC三种聚碳酸酯透明板材进行了热水老化实验研究。在老化时间0～200 h内，共取样9次，研究了三种PC在热水老化过程中的吸水规律、不同热水老化条件对PC表面微观破坏形貌的影响，讨论了PC热水老化机理。结果表明：PC的含水量随着时间的延长而增大，最终趋于平衡；温度越高，平衡含水量越大；时间越长或温度越高，PC吸水试样表面的微缺陷越多；由于PC的水解，导致平衡含水量Mm和扩散系数Dx的理论估算值低于实验值。
In the hot water of 40℃, 60℃, 80℃ and 100℃, the hot water aging of Bayer-PC, Japan-PC and Korea-PC was investigated. The number of samples is 9 in the aging time of 0～200 h. The law of water absorption in the process of hot water aging and the effects of different hot water aging conditions on the surface fracture appearances of PCs were studied. The hot water aging mechanism of PCs was discussed. The results show: (1) with increasing of time and temperature, the moisture content increases and goes a equilibrium value; (2) the number of microcavities increases progressively with the time and temperature; (3) because of the hydrolysis of PCs, the theoretical values of equilibrium moisture Mm and diffusivity Dx are higher than the experimental values.
参考文献
| [1] | ［1］ 李勇进，王公善. 透明塑料材料现状及其改性研究动态［J］. 塑料，1998，27（1）：27－30. |
| [2] | ［2］ 化学工业部合成材料老化研究所编. 高分子材料老化与防老化［M］． 北京： 化学工业出版社，1979．396－400. |
| [3] | ［3］ Akele N,Thominette F, Paris D， et al. Physical aging and water sorption in polycarbonate［J］. Journal of materials Science Letters,1996,15(11): 1000－1002. |
| [4] | ［4］ Jost W. Diffusion in Solids, Liquids, Gases［M］. New York: Academic Press, 1960. 379. |
| [5] | ［5］ Marsh L L, Lasky R, Seraphim D P, et al. Moisture solubility and diffusion in epoxy and epoxy-glass composites［J］. IBM Journal of Research and Development, 1984, 28(6): 655－661. |
| [6] | ［6］ Shen C H, Springer G S. Moisture absorption and desorption of composite materials［J］. Journal of Composite Materials, 1976, 10(1): 2－20. |
| [7] | ［7］ Robersen L M, Crisafulli S T. Microcavity formation in engineering polymers exposed to hot water［J］. J Appl Polym Sci，1983,28(9):2925－2936. |
| [8] | ［8］ Narkis M, Nicolais L, Apicella A et al. Hot water aging of polycarbonate［J］. Polym Eng & Sci， 1984, 24(3): 211-217. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%