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首页> 外文会议>International symposium on polymer physics : Preprints >LAWS CONTROLLING CRYSTALLIZATION, RECRYSTALLIZATION AND MELTING IN BULK POLYMERS
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LAWS CONTROLLING CRYSTALLIZATION, RECRYSTALLIZATION AND MELTING IN BULK POLYMERS

机译：本体聚合物中结晶，再结晶和熔融的控制规律

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@@Experiments carried out during the last decade revealed several laws which control polymer crystallization and melting in bulk [1]: (1)The crystal thickness dc is inversely proportional to the distance to a temperature Tc∝ which is located above the equilibrium melting point Tf∝. (2)Recrystallization processes result in crystal thicknesses which are also inversely proportional to the distance to Tc∝ (3) The lamellar crystallites are composed of blocks with a lateral size proportional to dc. (4) The temperature dependence of the growth rateu can be described by the equation The first exponential factor refers to the segmental mobility in the melt as described by the VogelFulcher law. The second exponential factor which controls the growth rate at high temperatures implies the existence of a temperature dependent activation barrier which diverges at the "zero growth temperature" Tzg. Hence, polymer crystallization and melting is controlled by 3 characteristic temperatures, Tc∝, Tf∝,Tzg, rather than the equilibrium melting temperature (Tf∝) only.
机译：@@在过去十年中进行的实验揭示了控制聚合物结晶和本体熔融的几条定律[1]：（1）晶体厚度dc与到温度Tc distance的距离成反比，温度Tc is位于平衡熔点以上Tf∝。 （2）再结晶过程产生的晶体厚度也与到Tc 1的距离成反比。（3）层状微晶由横向尺寸与dc成正比的块组成。 （4）生长速率u的温度依赖性可以用等式描述。第一指数因子是指如VogelFulcher定律所述的熔体中的分段迁移率。控制高温下的生长速率的第二指数因子暗示存在依赖于温度的活化势垒，其在“零生长温度” Tzg下发散。因此，聚合物的结晶和熔融是由三个特征温度Tc 1，Tf 1，Tzg控制的，而不是仅由平衡熔融温度（Tf 1）控制的。

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