冷却方式对过冷压制PEN单聚合物复合材料的影响

为研究冷却方式对聚萘二甲酸乙二醇酯(PEN)单聚合物复合材料(SPC)的影响,分别采用了随机冷却、骤冷和自然冷却的方式,过冷压制成型了PEN SPC样品;使用DSC热分析法确定了冷却速度对PEN基体的影响;使用万能试验机比较了PEN SPC样品的力学性能. 研究结果表明:随机冷却的方式得到的PEN SPC的拉伸强度最小,拉伸模量最高,是由冷却速度慢导致结晶引起的;骤冷的方式得到的拉伸模量最低,是由冷却速度过快导致无定形引起的;自然冷却方式得到的拉伸强度最高,是由于适中的冷却速度有利于基体渗透. 

Influence of Cooling Mode on the Properties of Polyethylene Naphthalate Single-Polymer-Composites Produced by Undercooling Compaction

In order to study the influence of cooling mode on the properties of Polyethylene naphthalate (PEN) single-polymer-composites (SPC), stochastic cooling mode, shock cooling and natural cooling were used in the undercooling compaction of PEN SPC. DSC thermal analysis was used to determine the effects of cooling rate on the PEN matrix, universal testing machine was used to determine the tensile properties of the PEN SPC. Results show that the maximum strength can be obtained by the stochastic cooling mode which can cause crystalline with slow cooling rate, the minimum modulus is obtained by the shock cooling mode which can cause amorphous material with faster cooling rate, the maximum tensile strength is obtained by the natural cooling mode which benefits the infiltrating of matrix due to the suitable cooling rate.