scispace - formally typeset
Search or ask a question
Topic

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
More filters
Journal ArticleDOI
16 Nov 2009-Polymer
TL;DR: In this paper, the interface/morphology relationship in polyethylene/TPS blends prepared by a one-step extrusion process is examined in detail, and the level of glycerol content in the TPS is shown to lead to different emulsification behaviors.

117 citations

Journal ArticleDOI
TL;DR: In this article, the application of novel environment-conscious hydrogels as an adsorbent for heavy metal ion adsorption from aqueous solutions was examined, where chitosan was blended with highly concentrated carboxymethylated cellulose (CM-cellulose) solution, which were crosslinked by additionless irradiation technique.
Abstract: The application of novel environment-conscious hydrogels as an adsorbent for heavy metal ions adsorption from aqueous solutions was examined. Chitosan was blended with highly concentrated carboxymethylated cellulose (CM-cellulose) solution to form CM-cellulose/chitosan physical hydrogels, which were crosslinked by additionless irradiation technique. The adsorptive properties of the blend hydrogels against some divalent heavy metal ions were investigated by batch adsorption method. It was found that the addition of chitosan increased the crosslinking degree and the adsorption capacity of the blend hydrogels. As a typical example, experimental data of Cu(II) ion were exploited for kinetic and isothermal evaluations. Copper adsorption process was found to be initially transport-controlled, and its adsorption isotherm can be fitted well into the Langmuir equation. Cu(II) adsorption mechanism can be viewed as the complexation of the Cu(II) with carboxyl groups and amino groups on the CM-cellulose/chitosan gel during the adsorption. From these preliminary evaluations, it is possible to conclude that the CM-cellulose/chitosan blend hydrogels have great potential for applications in water treatment for the removal of heavy metal ions. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

117 citations

Book ChapterDOI
TL;DR: The concept of poly(e-caprolactone) is unusual in being considered compatible with several polymers to produce useful polymer blends as mentioned in this paper, and is often referred to as a series of blends involving one or more crystallisable components.
Abstract: Poly(e-caprolactone) is unusual in being considered compatible with several polymers to produce useful polymer blends. Such blends have been widely investigated both with regard to producing blends with enhanced physical or mechanical properties and to plasticizing rigid polymers with a polymeric plasticizer which will not leach from its substrate. These several materials have potential practical applications. In addition, blends of poly(e-caprolactone) are probably the most widely investigated series of blends involving one or more crystallisable components and, in this context, provide information which enhances the general understanding of polymer blends.

117 citations

Journal ArticleDOI
TL;DR: In this article, the influence of the molecular weight, architecture, and chemical composition of the interfacial agent on its ability to emulsify a polymer blend was examined, and the observed behavior is similar to that of classical emulsions: a rapid drop in phase size at low concentrations of interfacial modifier, followed by a levelling off to an equilibrium diameter value once a critical concentration has been reached.
Abstract: Interfacial agents used in the compatibilization of immiscible polymer blends often consist of block copolymers containing at least one segment compatible with each of the two phases of the blend. This work examines the influence of the molecular weight, architecture, and chemical composition of the interfacial agent on its ability to emulsify a polymer blend. The system chosen is a blend containing 80% polystyrene and 20% ethylene-propylene rubber, compatibilized by diblock copolymers of poly(styrene-hydrogenated butadiene). The emulsification curve, which relates the dispersed phase particle size to the concentration of interfacial agent added to the system, was used as a tool to characterize the efficacy of the different interfacial agents. The observed behavior is similar to that of classical emulsions: a rapid drop in phase size at low concentrations of interfacial modifier, followed by a levelling off to an equilibrium diameter value once a “critical” concentration has been reached. For systems compatibilized by symmetrical diblocks (i.e., containing approximately 50% styrene by weight), the volume average particle diameter decreased from 2.7 μm for the unmodified system to about 0.4 μm once interfacial saturation is reached. The critical concentration for emulsification decreased with increasing interfacial agent molecular weight, due to the higher interfacial area occupied by longer molecules; however, this parameter did not affect the equilibrium particle diameter. The asymmetrical diblock copolymer (30% styrene) was found to be less effective than the symmetrical ones over the entire range of concentrations studied (5 to 35% modifier, based on the volume of the minor phase). Asymmetrical diblock copolymers would tend to form micelles, whereas symmetrical copolymers are less constrained at the interface. No significant difference was observed between the emulsifying capability of tapered and pure diblocks of similar composition and molecular weight. © 1996 John Wiley & Sons, Inc.

117 citations

Journal ArticleDOI
TL;DR: In this article, the dielectric function of polyfluorene-fullerenes is deduced using spectroscopic ellipsometry for the blend of the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and the alternating polyfluororene copolymer, poly [2,7-(9,9-dioctyl-fluorenes)-alt-5,5-(4′,7′-di-2-thienyl-2,1′,
Abstract: Blends of polyfluorene-fullerenes are promising materials for polymer-based photovoltaic devices (PPVD). Using spectroscopic ellipsometry we deduce the dielectric function for the blend of the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) and the alternating polyfluorene copolymer, poly [2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)] DiO-PFDTBT (4:1 by weight), for the wavelength interval 250–1300nm. n reaches above 2 and saturates to 1.9 for high wavelengths. Absorption starts at 720nm (1.72eV) and reaches a crest around 550nm (2.25eV). The spin coating introduces anisotropy in the blend, manifested in birefringence as well as in dichroism. The dielectric function for the blend versus its constituents is not additive. There are indications that the constituents lost their dielectric identity, as screening cannot explain the experimental data. Simulations of optical absorption inside a PPVD are performed for both monochromatic and polychromatic ...

117 citations


Network Information
Related Topics (5)
Polymer
131.4K papers, 2.6M citations
96% related
Polymerization
147.9K papers, 2.7M citations
93% related
Nanocomposite
71.3K papers, 1.9M citations
91% related
Phase (matter)
115.6K papers, 2.1M citations
88% related
Amorphous solid
117K papers, 2.2M citations
85% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202383
2022167
2021411
2020451
2019427
2018439