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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.


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Patent
28 Mar 1989
TL;DR: The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto as mentioned in this paper, which can be used to impart high tensile modulus and high sag resistance without increasing melt viscosity.
Abstract: A novel graft copolymer capable of imparting to a polyolefin when blended therewith high tensile modulus and high sag resistance without increasing melt viscosity, and a method of making the same. The graft copolymer is a polyolefin having a relatively high weight-average molecular weight methacrylate polymer grafted thereto. The graft copolymer is formed by dissolving or swelling a non-polar polyolefin in an inert hydrocarbon solvent, heating to dissolve the polyolefin, and while stirring the mixture, adding a methacrylate monomer, together with an initiator to produce a constant, low concentration of radicals, to form a graft copolymer with a high molecular weight polymer chain covalently bonded or grafted to the polyolefin backbone. The graft copolymer can be separated from the solvent, isolated by volatilizing the solvent, for example in a devolatilizing extruder, and extruded into a desired shape such as a sheet, tube or the like. This graft copolymer can be blended with a poolyolefin matrix. The blend exhibits improved physical properties in the melt, upon cooling, and in the solid state, and is useful in cast and oriented films, solid extruded rod and profile, foamed rod, profile and sheet, blown bottles and the like. The graft copolymer further improves compatibility in a wide range of polymer blends.

95 citations

Journal ArticleDOI
01 Aug 2002-Polymer
TL;DR: In this paper, partial miscibility of poly(methyl methacrylate) (PMMA)/polycarbonate (PC) partially miscible blends were evaluated by Tg measurements from dynamic mechanical thermal analysis.

95 citations

Journal ArticleDOI
TL;DR: In this article, the phase behavior and hydrogen bonding in ternary polymer blends of phenolic resin, poly(ethylene oxide) (PEO), and poly(e-caprolactone)(PCL) were investigated by using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR).
Abstract: The phase behavior and hydrogen bonding in ternary polymer blends of phenolic resin, poly(ethylene oxide) (PEO), and poly(e-caprolactone) (PCL) were investigated by using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). Although all three binary blends are respective miscible, there exists a closed immiscibility loop in the phase diagram due to the so-called “Δχ” and “ΔK” effects in this hydrogen-bonded ternary polymer system. The interassociation equilibrium constant based on the Painter−Coleman association model between phenolic resin and PEO can be indirectly calculated from the fraction of hydrogen-bonded carbonyl groups. Quantitative analyses show that the hydroxyl−ether interassociation is more favorable than the hydroxyl−carbonyl interassociation at room temperature. The interaction energy density value of BPEO/PCL= −2.85 cal/cm3 was obtained by comparing the theoretically predicted phase diagram with experimental data.

95 citations

Patent
12 Aug 1965

95 citations

Journal ArticleDOI
01 Nov 2000-Langmuir
TL;DR: In this article, atomic force microscopy (AFM) is used to investigate the heterogeneity of blended films of poly(methyl methacrylate) (PMMA) and polybutadiene (PB) on silicon substrates before and after annealing.
Abstract: In this study, atomic force microscopy (AFM) is used to investigate the heterogeneity of blended films of poly(methyl methacrylate) (PMMA) and polybutadiene (PB) on silicon substrates before and after annealing. The blended films with different ratios of PMMA to PB are prepared by spin casting onto silicon substrates from solution. The surface morphology and composition of these cast films are investigated using tapping mode and force mode AFM. Annealing the samples in air at 75 ± 5 °C causes changes in the relative chemical and mechanical differences between PMMA and PB, so the phase image contrast is studied as a function of annealing time. The effect of tapping force level on phase image contrast is also explored. To identify the different components in polymer blends and to understand the influence of relative surface stiffness on the phase images, nanoscale indentation measurements are made on the observed phase-separated regions. Interpretation of AFM results is aided by data collected from both con...

95 citations


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