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本文从三个方面考虑了聚氯乙烯的流变学特性,即:(a)在微晶真熔点以下的微粒流,(b)在熔点时或在熔点以上时的真熔化流,与(c)聚氯乙烯配科的流动。本文重新考察了在制备不同分子量的聚合物用的不同聚合温度所产生的结构差异.对熔融粘度与流动活化能的影响;并提出了新的数据以澄清间同规正度与分子量的效应。本文表明了聚氯乙烯的三种流动特性是三个不同的流动区表征的。由于热不稳定性,真正的流动区很难达到。在工业操作中.在硬质塑料配方中,后一状态即使得到过,也是难得的。配料添加剂(特别是润滑剂与增塑剂).与温度经历和捏和经历对流动特性的影响,也从流动机制的角度加以讨论。
This paper considers the rheological properties of PVC in three aspects: (a) the flow of particles below the true melting point of the crystallite, (b) the true melting flow at or above the melting point, and (c PVC with the flow of the Branch. This paper re-examined the structural differences in the different polymerization temperatures used to prepare polymers of different molecular weights, the effect on melt viscosity and flow activation energy, and presented new data to clarify the effect of the inter-regiment normality and molecular weight. This paper shows that the three flow characteristics of PVC are characterized by three different flow zones. Due to thermal instability, the real flow area is difficult to reach. In industrial operations, the latter state is rare even in hard plastic formulations. Ingredients Additives (especially lubricants and plasticizers) The effects of temperature history and kneading on the flow characteristics are also discussed in terms of flow mechanisms.