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首页> 外文会议>IUPAC 10th International conference on novel materials and their synthesis: Book of abstracts >CHARACTERIZATION OF MORPHOLOGIES OF COMPATIBILIZED POLYPROPYLENE/ POLYSTYRENE BLENDS WITH NANOPARTICLES VIA NONLINEAR RHEOLOGICAL PROPERTIES FROM FT-RHEOLOGY
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CHARACTERIZATION OF MORPHOLOGIES OF COMPATIBILIZED POLYPROPYLENE/ POLYSTYRENE BLENDS WITH NANOPARTICLES VIA NONLINEAR RHEOLOGICAL PROPERTIES FROM FT-RHEOLOGY

机译：FT-流变学从非线性流变学特性表征相容性聚丙烯/聚丙烯酸酯共混物的形貌

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Linear and nonlinear viscoelastic properties under dynamic oscillatory shear flow were used to investigate the effects of compatibilization on polypropylene (PP)/polystyrene (PS) blends. Two different nanoparticles (organo-modified clay and fumed silica) were used at various concentrations. To analyze nonlinear stress under large amplitude oscillatory shear (LAOS) flow, nonlinearity (I3/1) was calculated from FT-rheology. To quantify the degree of dispersion of different particles at various concentrations, a new parameter, nonlinear-linear viscoelastic ratio (NLR ≡ normalized nonlinear viscoelasticityormalized linear viscoelasticity), was used. The relationship was determined between NLR value and PS droplet size in the PP matrix. From the TEM images, clay was located mostly at the interface or partially inside the PS drops, thereby reinforcing the compatibilization effect. Therefore, clay increased the dispersion morphologies of the PP/PS blends. In contrast, fumed silica was located mostly inside the PS droplets, which means the morphologies of PP/PS blends were not improved. Linear viscoelasticities of both PP/ PS/clay and PP/PS/silica showed improvements at elevated particle concentrations. NLR values for the PP/PS/Clay blends were larger than 1 (NLR ＞ 1), whereas NLR values for the PP/PS/silica blends were less than 1 (NLR ＜ 1). Therefore, NLR could be classified into two categories depending on morphology. Based on these results, NLR can be used to distinguish between the effects of two different types of nanoparticles on the morphologies of PP/PS blends.
机译：利用动态振荡剪切流下的线性和非线性粘弹性，研究相容性对聚丙烯（PP）/聚苯乙烯（PS）共混物的影响。以不同的浓度使用了两种不同的纳米粒子（有机改性的粘土和气相二氧化硅）。为了分析大振幅振荡剪切（LAOS）流动下的非线性应力，从FT流变学计算了非线性（I3 / 1）。为了量化不同浓度下不同颗粒的分散程度，使用了一个新参数非线性线性粘弹性比（NLR≡归一化非线性粘弹性/归一化线性粘弹性）。确定了NLR值与PP基质中PS液滴尺寸之间的关系。从TEM图像来看，粘土主要位于PS液滴的界面处或部分位于PS液滴的内部，从而增强了增容作用。因此，粘土增加了PP / PS共混物的分散形态。相比之下，气相二氧化硅主要位于PS液滴内部，这意味着PP / PS共混物的形态没有得到改善。 PP / PS /粘土和PP / PS /二氧化硅的线性粘弹性在提高的颗粒浓度下均表现出改善。 PP / PS /粘土共混物的NLR值大于1（NLR＞ 1），而PP / PS /二氧化硅共混物的NLR值小于1（NLR ＜1）。因此，根据形态，NLR可以分为两类。基于这些结果，NLR可用于区分两种不同类型的纳米粒子对PP / PS共混物形态的影响。

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