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plastics several 特征 temperature
(1)玻璃化 temperature degree Tg: 指无定 type polymer (包括 crystallization type polymer in non crystallization separation )由玻璃态 toward high elastic or rear toward front 者 转变 temperature degree. is type polymer large separation 子链段自由运动 most low temperature degree, is products as temperature degree upper 限. (2)熔化 temperature degree Tm: for/regarding crystallization type polymer, large separation structure 三维远程 has 序态转变 is viscous temperature degree, melting point. is crystallization type polymer molding processing temperature degree lower 限. (3) flow temperature degree Tf: 指无定 type polymer high elastic 态转变 is viscous temperature degree. is type plastics processing temperature degree lower 限. (4)不 flow temperature degree: in pressure lower 不发生 flow most high temperature degree. is will amount plastics add fine tube/pipe 流变仪口模 upper material in, add hot certain temperature degree, temperature new 10min rear, add 50MPA恒 pressure, material from in 流出, pressure rear will material temperature rise high difficult degree 10 degree, temperature 10min rear again add large small pressure, 如此继续直至 melt from in is 止, will temperature degree decrease 出10 degree is material flow temperature degree. (5) separation understanding temperature degree Td: 指处于 viscous polymer temperature degree 进一步 rise high 时, make separation degradation add 剧, rise make polymer separation obvious degradation temperature degree is separation understanding temperature degree.
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