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首页> 外文期刊>Journal of Applied Polymer Science >STRUCTURAL CHANGES OF PVC PLASTISOLS IN PROGRESS OF GELATION AND FUSION AS INVESTIGATED WITH TEMPERATURE-DEPENDENT VISCOELASTICITY, MORPHOLOGY, AND LIGHT SCATTERING
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STRUCTURAL CHANGES OF PVC PLASTISOLS IN PROGRESS OF GELATION AND FUSION AS INVESTIGATED WITH TEMPERATURE-DEPENDENT VISCOELASTICITY, MORPHOLOGY, AND LIGHT SCATTERING

机译：研究与温度相关的粘弹性，形态和光散射特性的PVC塑料在胶凝和融合过程中的结构变化

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摘要

The structural changes of poly(vinyl chloride) (PVC) plastisols during mixing of PVC with a plasticizer was investigated; as the temperature was increased, the system was found to transform from a suspension of solid particles in a liquid medium to a swollen gel and ultimately to a fused homogeneous matrix. The dynamic viscoelastic measurements were utilized to continuously monitor the changes of moduli under a controlled heating rate, employing a mechanical spectrometer. Characteristic changes in the viscoelastic behavior were associated with changes in particulate morphology as observed with a scanning electron microscope (SEM). Both viscoelastic and morphological observations were shown to provide details of structural changes in conjunction with the behavior of the PVC-plasticizer interaction, enabling a qualitative discrimination of the gelation and fusion processes. An in situ small-angle light-scattering (SALS) method was performed to make a quantitative estimate for the swollen particles of PVC while they were in the progress of gelation and fusion. From the manner of increase in correlation distances, along with the changes in viscoelastic moduli and morphology, the swelling behavior of the particulate structures were examined on the quantitative basis and brief insight into the complex behavior of the PVC-plasticizer interaction began to be unfolded. (C) 1995 John Wiley and Sons, Inc. [References: 9]
机译：研究了聚氯乙烯与增塑剂混合过程中塑料溶胶的结构变化。随着温度升高，发现该系统从固体颗粒在液体介质中的悬浮液转变为溶胀的凝胶，最终转变为熔融的均匀基质。动态粘弹性测量用于利用机械光谱仪在受控的加热速率下连续监测模量的变化。如用扫描电子显微镜（SEM）观察到的，粘弹性行为的特征变化与颗粒形态的变化有关。粘弹性和形态学观察均显示与PVC-增塑剂相互作用的行为有关的结构变化细节，从而可以对胶凝和融合过程进行定性判别。进行了原位小角度光散射（SALS）方法，以定量评估在胶凝和融合过程中PVC的溶胀颗粒。从相关距离增加的方式，以及粘弹性模量和形态的变化，定量研究了颗粒结构的溶胀行为，并开始深入了解PVC-增塑剂相互作用的复杂行为。 （C）1995 John Wiley and Sons，Inc. [参考：9]

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