Compatibilization of polymer blends

However, the difference between the rate of coalescence in the Newtonian and viscoelastic matrices was not pronounced. 

Compatibilization can be defined as a process leading to an increase in interfadal adhesion between the components of an immiscible polymer blend and, thus, to enhance the mechanical properties of the blend. This goal is usually achieved by the incorporation of compatibilizers, which are macromolecular species located preferentially at the interface. Two important objectives of compatibilizers in the blending process are (i) to decrease the domain size and (ii) to stabilize the morphology induced by blend processing. Polymers with a blocky structure, where each of the constituent blocks is miscible or compatible with one blend component, are commonly used as compatibilizers [113,114]. In the ideal case, each block of a compatibilizer penetrates the parent phase and forms entanglements 

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Polymer-Polymer Miscibility and Compatibilization of Polymer Blends.298... 

POLYMER-POLYMER MISCIBILITY AND COMPATIBILIZATION OF POLYMER BLENDS... 

Source Mangaraj, D., Markham, R., and Parsons, A., Compatibilization of polymer blends, Battelle Multiclient Report, 1994. 

Nonreactive compatibilization, of polymer blends, 20 324-325 Nonreactive diluents, 10 429—430 Nonreactive silicones, in fiber finishing, 22 593... 

The possibilities for applications of these block copolymers are extremely broad. Amphiphilic systems are of interest for all applications similar to low molecular weight surfactants. Copolymers without a water soluble block can be used e.g. for the compatibilization of polymer blends. The bulk materials offer broad applications in the field of advanced materials having outstanding mechanical properties. 

In this chapter, compatibilization of polymer blends by means of addition of a compatibilizer will be discussed. First, the theories will be summarized of the (i) interface, (ii) interphase, and (iii) compatibilization process. This brief summary is to provide a general framework for understanding the phenomena associated with compatibilization, and guidance for optimization of the process to gain maximum performance. 

Ternary blends that comprise two immiscible polymers and a copolymer are of a particular interest. They not only represent an ideal model for studying compatibilization of polymer blends, but also they have found direct commercial applications. Phase diagram information can be found in reviews by Ajji and Utracki [1996, 1997] and in Chapter 2 in this Handbook. 

Table 5.7. Continued Reactive Compatibilization of Polymer Blends 355... 

Reactive Compatibilization of Polymer Blends Table 5.21. Graft copolymer formation in PA/Styrene copolymer blends by amine + oxazoline reaction 371... 

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