scholarly journals The Effects of Copolymer Compatibilizers on the Phase Structure Evolution in Polymer Blends—A Review

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7786
Author(s):  
Ivan Fortelný ◽  
Josef Jůza

This paper summarizes the results of studies describing the effect of block and graft copolymers on the phase structure formation and evolution in immiscible polymer blends. The main phenomenological rules for prediction of the copolymer compatibilization efficiency are briefly described and compared with selected experimental data. The results of the theories of equilibrium distribution of a copolymer between the blend interface and the bulk phases and its effect on the blend interfacial tension are summarized. The theories of the compatibilizer effect on the droplet breakup in flow are analyzed. The mechanisms of the copolymer effect on the coalescence of droplets in flow are compared and their effect on the droplet size is shown. The problems of reliable description of the effect of a copolymer on the coalescence in quiescent state are presented. Obstacles to derivation of a realistic theory of the copolymer effect on the competition between the droplet breakup and coalescence are discussed. Selected experimental data are compared with the theoretical results.

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 761 ◽  
Author(s):  
Fortelný ◽  
Jůza

Control of the phase structure evolution in flowing immiscible polymer blends during their mixing and processing is fundamental for tailoring of their performance. This review summarizes present state of understanding and predictability of the phase structure evolution in flowing immiscible polymer blends with dispersed structure. Results of the studies of the droplet breakup in flow, important for determination of the droplet breakup frequency and of the size distribution of the daughter droplets, are reviewed. Theories of the flow-induced coalescence providing equations for collision efficiency are discussed. Approximate analytic expressions reliably describing dependence of the collision efficiency on system parameters are presented. Available theories describing the competition between the droplet breakup and coalescence in flow are summarized and approximations used in their derivation are discussed. Problems with applicability of available theories on prediction of the droplet size evolution during mixing and processing of immiscible polymer blends, which have not been broadly discussed so far, are addressed.


2016 ◽  
Vol 18 (47) ◽  
pp. 32125-32131 ◽  
Author(s):  
Yamin Pan ◽  
Xianhu Liu ◽  
Xiaoqiong Hao ◽  
Dirk W. Schubert

The simultaneous evolution of conductivity and phase morphology of blend composites was investigated under shear and in the quiescent state.


2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Hangming Shen ◽  
Donggang Yao ◽  
Wei Zhang ◽  
Qian Ye

Abstract There has been growing interest in integrating gradient porous structures into synthetic materials like polymers. One particular method for making gradient porous polymers is nonisothermal annealing of co-continuous phase structures of immiscible polymer blends under well-defined thermal boundary conditions. In this paper, we report a method to simulate this nonisothermal phase coarsening process for the generation of gradient-phase structures by the combined implementation of phase-field transport and momentum transport. Specifically, a phase-field equation is solved first to obtain a phase structure with phase size comparable with that of the blend to be annealed. This phase structure is then used as an initial geometry in a two-phase moving-interface flow simulation to gauge into the phase structure coarsening process. Several case studies were performed, and the results show that the controllable generation of gradient-phase structures can be enabled by well-designed geometry and thermal boundary conditions. Using 2D simulations, different types of gradient-phase structures experimentally observed were predicted. With increasing power in computation, the capability of 3D simulation may be unveiled for a more accurate prediction of the nonisothermal phase coarsening process and may ultimately evolve into a useful tool for the design and processing of gradient porous polymers.


Polimery ◽  
2009 ◽  
Vol 54 (02) ◽  
pp. 139-144 ◽  
Author(s):  
IVAN FORTELNY ◽  
MONIKA LAPCIKOVA ◽  
FRANTISEK LEDNICKY ◽  
ZDENEK STARY ◽  
ZDENEK KRULIS

2012 ◽  
Vol 51 (10) ◽  
pp. 2026-2033 ◽  
Author(s):  
Ivan Fortelný ◽  
Bojan Dimzoski ◽  
Danuše Michálková

2000 ◽  
Vol 33 (2) ◽  
pp. 371-374 ◽  
Author(s):  
Anthony J. Ramic ◽  
Julia C. Stehlin ◽  
Steven D. Hudson ◽  
Alexander M. Jamieson ◽  
Ica Manas-Zloczower

2008 ◽  
Vol 48 (3) ◽  
pp. 564-571 ◽  
Author(s):  
Ivan Fortelný ◽  
Monika Lapčíková ◽  
František Lednický ◽  
Zdeněk Starý ◽  
Zdeněk Kruliš

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