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Polymer blend

About: Polymer blend is a research topic. Over the lifetime, 18474 publications have been published within this topic receiving 437183 citations. The topic is also known as: polymer mixture & Polymerblend 或者 Polyblend.


Papers
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Journal ArticleDOI
TL;DR: In this article, a simple model for the free energy of mixing of compressible polymer blends, based on a modification of the regular solution model, is presented to qualitatively capture the phase behavior of weakly interacting polymer pairs using only the pure component properties of mass density, solubility parameter, and thermal expansion coefficient.
Abstract: Given the intrinsic relation between phase behavior and performance in applications involving polymer mixtures, the thermodynamics of these systems has been the common focus of a wide body of experimental and theoretical studies. An elusive goal in this research field has been the ability to predict or simulate the degree of thermodynamic compatibility of two distinct homopolymers based on pure component properties alone. In an attempt to address this need, we present a simple model for the free energy of mixing of compressible polymer blends, based on a modification of the regular solution model. Its ability to qualitatively capture the phase behavior of weakly interacting polymer pairs using only the pure component properties of mass density, solubility parameter, and thermal expansion coefficient is demonstrated. To this end, a wide range of blend chemistries is considered, spanning purely dispersive polyolefin systems to those comprising more polar components, such as poly(methyl methacrylate), poly(e...

126 citations

Book ChapterDOI
Kurt Binder1
TL;DR: In this article, the authors present a survey of results obtained with the Self-Consistent Field Theory of Phase Separation in Thin Films, including block copolymers in the weak and strong segregation limit.
Abstract: 2.1 Mean-Field Theory of Phase Separation in Thin Films. . . . . . . . 8 2.2 Block Copolymers in the Weak Segregation Limit . . . . . . . . . . 22 2.3 Block Copolymers in the Strong Segregation Limit. . . . . . . . . . 37 2.4 Survey of Results Obtained with the Self-Consistent Field Theory . . 41 2.5 Concepts on Interfaces in Confined Geometry . . . . . . . . . . . . 47 2.6 Computer Simulation of Polymer Blends in Thin Films . . . . . . . 51 2.7 Computer Simulation of Confined Block Copolymers . . . . . . . . 60 2.8 Dynamics of Phase Separation in Films: an Introduction . . . . . . 65

126 citations

Journal ArticleDOI
TL;DR: In this article, X-ray photoelectron spectroscopy (XPS) was used to measure the surface chemical compositions of polystyrene (PS) and poly(methyl methacrylate) (PMMA) blend.
Abstract: Films of polystyrene (PS) and poly(methyl methacrylate) (PMMA) blend have been annealed at a temperature above their glass transition temperatures for up to 48 h. Surface chemical compositions of the cast and annealed films were measured by X-ray photoelectron spectroscopy (XPS) while surface topographical changes were followed by atomic force microscopy (AFM). The blend films spin-cast from chloroform produce nonequilibrium surfaces with a significant excess of PMMA. The polymer component with a lower surface free energy, PS, is shown to segregate to the surface upon annealing. The PS surface concentration of the films, containing 50% PS:50% PMMA in the bulk, was evaluated using the ester peak in XPS C 1s spectra (sampling depth ∼ 9 nm) and found to increase from ∼5% (freshly spin-cast film) to a saturated level of ∼47% after 17 h of annealing. AFM imaging reveals evolution of blend morphology with annealing time. The spin-cast films prior to annealing exhibit pitted topography with typical pit size of ∼...

126 citations

Journal ArticleDOI
TL;DR: In this article, a thermogravimetric analysis coupled with Fourier transform infrared spectroscopy, TGA/FTIR, has been used to probe the degradation of several polymeric systems.

126 citations

Journal ArticleDOI
TL;DR: In this article, the authors make polypropylene (PP) and low-density polyethylene (LDPE) blends via injection molding carried out under various injection temperatures and evaluate their tensile and impact properties.

126 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202383
2022167
2021411
2020451
2019427
2018439