Mechanical and thermal properties of polycarbonate, part 1: Influence of free quenching
Mechanical and thermal properties of polycarbonate, part 1: Influence of free quenching
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DOI：
10.1002/app.28218
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发表时间：
2008-08-05
影响因子：
3
通讯作者：
Haddaoui, N.
中科院分区：
文献类型：
--
作者：
Rouabah, F.;Fois, M.;Haddaoui, N.
研究了不同热处理工艺对聚碳酸酯力学性能和热性能的影响。涉及将样品从熔融状态淬火至不同温度的第一淬火程序允许在0 ℃的淬火温度下改善冲击强度和断裂伸长率。第二次淬火程序，对应于在160 ℃（T-g + 15 ℃）下再次加热并第二次淬火的试样，对于40 ℃的淬火温度，显示出冲击强度和断裂伸长率的更好的增强，而损害其他性能，例如弹性模量、密度、屈服应力和热变形温度。这种效应与35 ℃左右的弛豫模式的存在有关。(C)2008 Wiley Periodicals，Inc.
The effect of different thermal treatments on the mechanical and thermal properties of polycarbonate was investigated. The first quenching procedure which involves the quench of the samples from the melt state to different temperatures allowed improving impact strength and elongation at break for a quenching temperature of 0 degrees C. A second quenching procedure, corresponding to specimens heated again at 160 degrees C (T-g + 15 degrees C) and quenched a second time, showed a better enhancement of the impact strength and elongation at break to the detriment of other properties such as elastic modulus, density, yield stress, and heat distortion temperature, for a quenching temperature of 40 degrees C. This effect was associated to the existence of a relaxation mode around 35 degrees C. (C) 2008 Wiley Periodicals, Inc.