Polymeric compatibilizers

S. Datta and DJ. Lohse, Polymeric Compatibilizers Uses and Benefits in Polymer Blends, C. Hanser Verlag, Munich (1996). 

Datta, S. and Lohse, D. 1996. Polymeric Compatibilizers. Hanser Gardner, Cincinnati, OH. Lutz, J. and Grossman, R. 2000. Polymer Modifiers and Additives. Dekker, New York. Powell, G.M. and Brister, J.E. 1900. Plastigels, US Patent 2,427,507. 

Santra RN et al. (1995) In-situ compatibilization of thermoplastic polyurethane and polydimethyl siloxane rubber by using ethylene methyl acrylate copolymer as a reactive polymeric compatibilizer. Adv Poly Technol 14(l) 59-66... 

D Lohse. Polymeric Compatibilizers—Uses and Benefits in Polymer Blends. Hanser Gardner, Cincinnati, Ohio, 1996. 

Datta S, Lohse DJ (1996) Polymeric compatibilizers. Hanser, New York... 

Datta, S., and Lohse, D. J., Polymeric Compatibilizers, Hanser/Gardner Publications, Cincinnati, 1996. 

Figure 8.19 A schematic representation of preparation for making polymeric compatibilizers based on nylon 66. (Reproduced from Reference (31) with permission from John Wiley Sons Inc.)...

Datta S, Lohse D. Polymeric Compatibilizers. Munich Hanser 1996. 

The sampUng of polymer blends in Polymeric Compatibilizers by S. Datta and D. J. Lohse, Hanser-Gardner, 1996, that >93% of polymer blends are combinations of thermoplastic and elastomers. However, automotive tires (5000kt/yr in 1995), a blend of elastomers, are the largest application for any immiscible polymer blend. 

S. Datta, D.J. Lohse, Polymeric Compatibilizers (Hanser/Gardner Publications, Cincinnati, 1996) S. Datta, N. Dharmarajan, J.-M. Dekoninck, D.A. White, US Patent 5,225,483,6 July 1993a, to Exxon S. Datta, N. Dharmarajan, G. Ver Strate, L. Ban, Polym. Eng. Sci. 33, 721 (1993b)... 

Ex situ compatibilization, or compatibilization by the addition of a pre-synthesized copolymer, provides an opportunity to easily control the molecular architecture of the additive to be used. Theoretically, block copolymers should seek the interfaces during melt mixing, to decrease unfavorable interactions [15,16]. Therefore, block or graft copolymers whose segments are chemically identical to, or have affinity with, the polymer components are often used as emulsifiers to reduce the interfadal tension, promote the dispersion of one phase into the other, and stabilize the resulting blend [17]. Hence, the polymeric compatibilizer to be added to a blend... 

S. Datta, D. J. Lohse, Polymeric Compatibilizers, Carl Hanser-Verlag, Munich 1996. 

C. Manzi-Nshuti, P. Songtipya, E. Manias, M. D. Jimenez-Gasco, J. M. Hossenlopp, and C. A. Wilkie, Polymer nanocomposites using zinc aluminum and magnesium aluminum oleate layered double hydroxides Effects of the polymeric compatibilizer and of composition on the thermal and Are properties of PP/LDH nanocomposites. Polymer Degradation and Stability, 94 (2009), 2042-54. 

As stated before, an addition of compatibilizer requires miscibility of one part of copolymer in ole polymeric phase, and miscibility of the second part in another. When the dissolved copolymer parts have molecular weight above the entanglement molecular weight value, the polymeric compatibilizer offers not only the interfacial activity, but also a mechanism for enhanced adhesion and stress transfer in the solid state. By contrast, the low molecular weight additives are forced by the laws of thermodynamics to diffuse into the interfacial space between the two principal polymeric phases. When properly selected, it also diffusses into the two phases, bringing their chemical potential closer, i.e., reducing the interfacial tension coefficient. 

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