glass transition temperaturedielectric relaxationpoly(ethylene terephthalate)semi-crystalline microstructureamorphous microstructureamorphous oriented microstructurebeta relaxationDielectric relaxation measurements on poly(ethylene terephthalate) (PET) samples of different microstructures (semicrystalline, amorphous, amorphous ...
玻璃化转变温度(TG,Glass Transition Temperature)是指物质从玻璃态转变为高弹性或高黏性状态的温度。在 TG 温度以下,材料表现出较高的脆性和较低的弹性;而在 TG 温度以上,材料具有较好的柔韧性和弹性。TG 温度是表征材料力学性能、物理性能和化学稳定性的一个重要参数。 4.PET 的 TG 温度对其性能的影响 PET 的...
the amorphous high polymer can be divided into three mechanical states: glassy state, high-elastic mode and viscous state. The transition between glassy state and high-elastic is called the Glass Transition Temperature; the corresponding temperature change ...
8、ric properties):比容(Specific volume)、密度(Density)及PVT关系2.热卡性质(Calorimetric properties):比热(Specific heat)、热传导系数(Thermal conductivity)、熔化热 (Heat offusion)、结晶热(Heat of crystallization)3.转移温度(Transition temperature):玻璃转移温度(Glass transition temperature)、熔点(melting po...
3. 熔融温度(Melting Temperature) PET材料的熔融温度是指材料从固态转变为液态的温度。可以通过差热分析(DSC)等技术测得。PET的熔融温度通常在240-260摄氏度之间。 4. 玻璃化温度(Glass Transition Temperature) PET材料的玻璃化温度是指材料从硬而脆的状态变为较为柔软和可塑性的状态的温度范围。PET的玻璃化温度...
玻璃化温度Glass TransitionTemperature(Tg) ISO 11357 ℃ 151 热变形温度DistortionTemperature ASTM D648(0.45MPa) ℃ 205 电气性能 Electrical properties 介电强度Dielectric Strength(25μm) ASTM D149 KV/mm 120 体积电阻Volume Resistivity@25℃,50%RH ...
1.放热反应(EXO-THERMICREACTION)射出成型融熔态(MELTSTATE)QUENCHED 冷却 固态瓶胚 2.吸热反应(ENDO-THERMICREACTION)瓶口牙区结晶固态无定型瓶口 △加热 结晶态瓶口 BCPREFORMBEFORECRYSTALLIZATION未结晶瓶胚(注塑瓶胚)AC PREFORMAFTERCRYSTALLIZATION结晶瓶胚 UnderstandingShrinkage&Distortion GlassTransitionTemperature(Tg)...
Glass Transition Temperature3 194 °F ISO 11357-2 Melting Temperature3 489 °F ISO 11357-3 CLTE ISO 11359-2 Flow 1.6E-5 in/in/°F Flow : -40 to 73°F 1.8E-5 in/in/°F Flow : 131 to 320°F 1.1E-5 in/in/°F Transverse ...
The glass transition temperature of PET varies depending on the degree of crystallinity. It has a Tg of 65-80°C. It has a melting temperature of 240-270°C. Amorphous PET has a Tg of 65°C. The Tg increases with an increasing degree of crystallinity. ...
3.转移温度(Transition temperature):玻璃转移温度(Glass transition temperature)、熔点(melting point) 当聚合物在玻璃转移温度(Tg)时,会由较高温时所呈现的橡胶态,转至低温呈现出似玻璃既硬又易脆的性质。结晶性(Crystalline)聚合物,由于具备晶格结构,即其高分子链排列有固定样式(结晶过程中高分子链排入结晶格子中...