Viscoelastic Properties of Polymer Blends in Miscible and Immiscible States

混溶和不混溶状态下聚合物共混物的粘弹性

基本信息

批准号：
04453105
负责人：
NODA Ichiro
金额：
$ 5.06万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04453105/
关键词：
Viscoelastic properties Polymer blends Miscible state Immiscible state Newtonian fluid mixtures Vicinity of phase separation Textured materials Shear-induced homogenization ポリスチレンポリビニルメチルエーテル textured material スケーリング則

项目摘要

Viscoelastic properties of polymer blends were studied in 1) miscible and 2) immiscible states, and 3) a vicinity of phase separation as follows :1) zero-shear viscosity etaﾟ and steady-state compliance J_e of polystirene/poly(vinyl methylether)(PS/PVME) blends in the miscible state were measures as functions of the molecular weight and composition of PS (M_<PS> and phi_<PS>) in the condition that M_<PS>>>M_<PVME> where M_<PVME> is the molecular weight of PVME.It was found that the etaﾟ of the polymeer blends in the semidilute region where phi_<PS><0.2, can be expressed by the same scaling law as semidilute polymer solutions, and the J_e almost agrees with that of polymer solutions. 2) Viscoelastic properties of silicone oil/liquid resin blends as a model of Newtonian fluid mixtures and polydimethylsiloxane/polybutadiene blends as a model of polymer blends were measured in the immiscible state. It was found that the shear stresses and normal stress differences of these blends are well explained by the theory of textured materials presented by Doi and Ohta, if the stresses of the component polymers are subtracted. 3) Viscoelastic properties of PS/PVME blends with the nearly critical compositions in steady-shear flow were studied in the vicinity of phase separation temperature. It was found that the shear rate dependences of viscosity eta and compliance J_s in the homogeneous region are almost the same as those of homopolymers, but the eta and J_s in the phase-separated region are enhanced at low shear rates and become consistent with those in the homogeneous region, when the shear rates are higher than their respective critical values, implying shear-induced homogenization.

聚合物混合物的粘弹性特性在1）可简化和2）不可分解状态中进行了研究，以及3）相分离的附近，如下所示：1）零剪切粘度ETA eTAﾟ和稳态的合规性J_E j_e j_e polystirene/poly（ps/pvme）的分组（ps/pvme）的分组（ps/pvme）的分组是摩尔（PS/pvme）的组合。（m_ <ps>和phi_ <ps>）在m_ <ps >>> m_ <pvme>的条件下，其中m_ <pvme>是pvme的分子量。发现在半多ilute区域中聚合物混合的聚合物的eta eTA the eTA sem and phi_ <ps> <ps> <ps> <ps> <0.2，并且可以通过smemin semim semiNe semiNe semiNe semiNe semiNe semiNe semiNe semiNe semiNe semition seperion seperion seperion，与聚合物溶液的那样。 2）硅油/液体树脂混合物的粘弹性作为牛顿流体混合物和聚二甲基硅氧烷/聚丁二烯混合物作为聚合物混合物模型的模型。发现这些混合物的剪切应力和正常应力差异是由DOI和OHTA提出的纹理材料理论很好地解释的，如果减去组件聚合物的应力。 3）在相位分离温度附近研究了PS/PVME与稳定剪切流中几乎关键组成的粘弹性。发现同质区域的粘度ETA和依从性J_的剪切速率依赖性与均聚物的剪切速率差异几乎相同，但是相位分离区域中的ETA和J_S在较低的剪切速率下增强，并且在剪切速率上与剪切速率相比，剪切速率比其优势的临界价值更高时，并变得更高。