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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 paper, a hydrophobically modified alkali-soluble copolymer is presented, which comprises a polyelectrolyte backbone bearing ethoxylate side chains capped with complex alkylaryl groups of a high molar volume.
Abstract: Rheological and photophysical data are presented for a hydrophobically modified alkali-soluble copolymer, of a constitution similar to materials currently employed as rheology modifiers in water-borne coatings. The copolymer comprises a polyelectrolyte backbone bearing ethoxylate side chains capped with complex alkylaryl groups of a high molar volume. In aqueous alkaline media, the hydrophobes associate dynamically, the topology of the network so formed being dependent on the polymer concentration. Photophysical studies, employing pyrene as a hydrophobic fluorescent probe, indicate the presence of hydrophobic associations. At concentrations below the coil overlap concentration, c*, these associations are predominantly intramolecular. At higher polymer concentrations, intermolecular interactions become more probable. This change in network topology is in qualitative agreement with previous theoretical considerations of associative polymer systems and is reflected in an unusually high concentration dependen...

136 citations

Patent
02 Sep 1999
TL;DR: A wide range of solid polymer electrolytes characterized by high ionic conductivity at room temperature, and below, are disclosed in this article, which are suitable for use in electrochemical cells and batteries.
Abstract: A wide range of solid polymer electrolytes characterized by high ionic conductivity at room temperature, and below, are disclosed. These all-solid-state polymer electrolytes are suitable for use in electrochemical cells and batteries. A preferred polymer electrolyte is a cationic conductor which is flexible, dry, non-tacky, and lends itself to economical manufacture in very thin film form. Solid polymer electrolyte compositions which exhibit a conductivity of at least approximately 10?-3 - 10-4? S/cm at 25°C comprise a base polymer or polymer blend containing an electrically conductive polymer, a metal salt, a finely divided inorganic filler material, and a finely divided ion conductor. The new solid polymer electrolytes are combinable with various negative electrodes such as an alkali metal, alkaline earth metal, transition metal, ion-insertion polymers, ion-insertion inorganic electrodes, carbon insertion electrodes, tin oxide electrode, among others, and various positive electrodes such as ion-insertion polymers and ion-insertion inorganic electrodes to provide batteries and supercapacitors having high specific energy (Wh/kg) (gravimetric) and energy density (Wh/l) (volumetric), high cycle life, low self-discharge and providing improved safety.

136 citations

Journal ArticleDOI
TL;DR: In this paper, the changes in properties and biodegradability of polylactides with high and low L-isomeric ratios of the lactate units (PLA99.0 and 77.0) ware melt-blended to analyze the changes and properties of the polymers blend.
Abstract: Polylactides with high and low L-isomeric ratios of the lactate units (PLA99.0 and 77.0, where the numbers correspond to the L-ratios) ware melt-blended to analyze the changes in properties and biodegradability with the polymers blend. The crystallinity of the blends was almost similar to that of the blends of PLLA and PDLLA. The glass transition behavior supported the compatibility of both polymers. The glass transition behavior was indicative of a compatible nature of both polymers. The tensile modulus of the blends was almost identical irrespectively of the blend ratio, while their tensile strength decresed with decreasing composition of PLA99.0. Above T g , the storage modulus of the blends dropped from 2-3 × 10 9 Pa 1-3 × 10 6 Pa and then increased to a different level depending on the crystalline nature of the blends. The biodegradability of the blends increased with decreasing composition of PLA99.0. This difference in degradability can be well explained by our random packing model of local hedices of the L-sequenced chains for the l-rich PLA samples.

135 citations

Patent
25 Apr 1991
TL;DR: In this article, a shape reinforced thermoplastic composite, such as composite laminate (10 or 10A), is formed by cutting each individual sheet or layer into pieces so that the direction of fiber orientation in each such piece is either parallel to one pair of edges or at angles of 45° to all of the edges.
Abstract: A shaped reinforced thermoplastic composite, such as composite laminate (10 or 10A), comprises a thermoplastic matrix polymer (22) and a plurality of fibers (20) of a liquid crystal polymer (LCP) which are formed in situ in the matrix polymer. This composite is formed by forming a prepreg as a plurality of individual sheets or layers (50), each of which comprises essentially unidirectionally oriented fibers (20) of said LCP in a thermoplastic polymer matrix (22). A lay-up is formed by cutting each individual sheet or layer into pieces so that the direction of fiber orientation in each such piece is either parallel to one pair of edges or at angles of 45° to all of the edges. The lay-up is shaped under heat and pressure to form the composite.

135 citations


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