Phase structure coarsening in polymer blends: predicted effects of the phase duality interval on selected physical properties

where A and B are positive constants characterizing enthalpy and entropy of the interaction parameter w 12 , respectively. Its positive value indicates a very poor miscibility of high molecular weight nonpolar polymers.Relations considering the compressibility of polymer blends are based on the equations-of-state theories (5,6,(8)(9)(10)(11)(12)(13)(14)(15)(16). These relations include contributions

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Polymer Blends

Horák¹,

Fortelný²,

Kolařı́k³

et al. 2005

Kirk-Othmer Encyclopedia of Chemical Technology

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Polymer Blends

Horák¹,

Fortelný²,

Kolařı́k³

et al. 2005

Encyclopedia of Polymer Science and Technology

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Blending of two or more different polymers makes it possible to achieve various property combinations of the resulting material—mostly in a more cost‐effective way than by synthesis of new polymers. The resulting multicomponent and mostly heterogeneous blends are an extraordinarily important group of polymer materials, which comprise about a third of the world's polymer production. Common features of preparation, evaluation, and application of polymer blends are the main subject of the chapter. The basic problems associated with the nonequilibrium phase structure and its coarsening, the effects of interfacial energy of components, the strategies of compatibilization of immiscible polymers, and methods of phase structure analysis are elucidated. Special attention is paid to mechanical properties of heterogeneous blends and their prediction. Commercially important types of polymer blends as well as recycling of commingled plastic waste are briefly discussed.

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Synergistic flame retardant effect of poly(ether sulfones) and polysiloxane on polycarbonate

Liu¹,

Yang²,

Jiang³

et al. 2011

J of Applied Polymer Sci

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Flame retardance of bisphenol A polycarbonate (PC) was improved by the co-addition of poly (ether sulfones) (PES) and polysiloxane/acrylate copolymer (PSiA) while retaining a high rigidity and toughness. A UL 94 V-0 rating for 1.6-mm thick samples of PC/PES/ PSiA blend with 10.0 wt % PES and 0.5 wt % PSiA (PC/ 10PES/0.5PSiA) was obtained. Its average heat release rate (av-HRR) in a cone calorimeter measurement was decreased by 19% on the basis of PC/PES blend with 10.0 wt % PES. Scanning electron microscopy (SEM) morphologies of impact-fractured surfaces revealed that the incorporation of 0.5 wt % PSiA decreased the dimensions of PES dispersed phase and provoked the uniform distribu-tion of PES in PC matrix. Thermogravimetric-Fourier transform infrared spectroscopy analysis results revealed that PSiA dominantly promoted the degradation of PC and the degraded products were combined with PES to form a superior flame-retarded carbon layer. A higher sulfur and silicon content on the residue surface after vertical burning tests detected by SEM/energy dispersive spectrometer signified their accumulation during combustion.

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Phase structure coarsening in polymer blends: predicted effects of the phase duality interval on selected physical properties

Cited by 4 publications

References 36 publications

Polymer Blends

Polymer Blends

Polymer Blends

Synergistic flame retardant effect of poly(ether sulfones) and polysiloxane on polycarbonate

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