Compatibility Studies Of Blends Of PPG 4000 And PEG 4000 Using Viscosity Technique

Certain properties of polymers can be enhanced by mixing it with another polymer. When two or more polymers are intimately mixed in a single continuous solid product, the composition is generally referred to as a polymer blend or polyblend. Depending upon the degree of miscibility or immiscibility,...

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Bibliographic Details
Published in:Proceedings of the 5th National Conference 2009-10, Vol.1249, p.59-62
Main Authors: Venkatramanan, K, Arumugam, V
Format: Article
Language:English
Subjects:
Additives
Blends
Block copolymers
Coils
Copolymers
Density
Deviation
Dilution
Graft copolymers
Immiscibility
Incompatibility
Law
Mathematical analysis
Miscibility
Multiphase
Nonlinearity
Polymer blends
Polymers
Refractive index
Refractivity
Separation
Shrinkage
Viscosity
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Summary:Certain properties of polymers can be enhanced by mixing it with another polymer. When two or more polymers are intimately mixed in a single continuous solid product, the composition is generally referred to as a polymer blend or polyblend. Depending upon the degree of miscibility or immiscibility, such a polyblend may resemble a random copolymer or a block or graft copolymer or it may show micro or macro heterogeneous separation into a multiphase system. Viscosity method is simple and it offers very useful information about the relationship between dilute solution properties and bulk structure of the polymer blend. The basic idea of using viscosity as a parameter for compatibility determination of polymer blends lies in the fact that in solution the repulsive interaction may cause shrinkage of polymer coils resulting in a viscosity of the polymer mixture that is lower than the value calculated from viscosities of the pure components on the assumption of the additive law. In the present study, an attempt has been made to blend PPG 4000 with PEG 4000 in 1,4 -Dioxane at 303K at 1% concentration. The blend compositions were formed in the ratio 0:,0.2:0.,0.4:0.,0.5:0.,0.6:0.,0.8:0.2,1:0. Relative viscosity of the blend compositions was determined and the values are nonlinear which showed incompatibility. Miscibility nature of the blends were determined further using additive law, log additive law and free volume additive law and the experimental values in all the cases showed negative deviation which is a characteristic of immiscible blend. The miscibility nature of the blend was further confirmed through density, ultrasonic velocity, refractive index and other techniques. The blend showed immiscibility.
ISSN:0094-243X