Polyurethane blends with poly

For polyurethane production, Donnelly [109] has carried out the synthesis of copolyurethanes based on mixtures of commercial poly(THF diol)s with glucose. Complex products resulted, which can be represented by mono- or bis(glucoside) structures. From a variety of polyol blends, solid polyurethanes were prepared which ranged from linear, soluble, weak elastomers to polymers of higher transition temperature and stiffness, low solubility, and low extension under tensile load [110]. 

This technology was first commercially applied to polyurethane blend [121] and patented as Rimplast (for Reactive Injection Molding), but many polymers have since been blended with polysiloxane thanks to this method polyethylene [122], polypropylene [122,123], polyamide [124-130], polyesters [128,131-133], poly(phenylene ether) [134], fluorocarbons [135] and many more. Many of them include reinforcing fillers such as fumed silica. The silicone base involved can moreover contain reactive groups such as the epoxy group [136,137]. A typical silicone base useful for these blends was de-... 

Hill DJT et al. (1996) Development of wear-resistant thermoplastic polyurethane by blending with poly(dimethyl siloxane). I. Physical properties. J Appl Poly Sci 61 (10) 1757—1766... 

A variety of polymers, both thermosets as well as thermoplastics, can be blended and coreacted with epoxy resins to provide for a specific set of desired properties. The most common of these are nitrile, phenolic, nylon, poly sulfide, and polyurethane resins. At high levels of additions these additives result in hybrid or alloyed systems with epoxy resins rather than just modifiers. They differ from reactive diluents in that they are higher-molecular weight-materials, are used at higher concentrations, and generally have less deleterious effect on the cured properties of the epoxy resin. 

Wang,P. S.,Chiu,W.,Chen,L.,Denq,B.,Don,T.,andChiu,Y.Thermaldegradationbe-havior and flammability of polyurethanes blended with poly (bispropoxyphosphazene). Polymer Degradation and Stability, 66, 307-315 (1999). 

Millable polyurethane elastomers are prepared from bi-functional castor oil or its blends, with poly(propylene glycol) at two different ratios of 1 4-butane diol as a chain extender and TDI. Castor oil-based polyurethane nanoparticles with an average diameter of 300 nm are prepared by a... 

Two types of environmentally friendly jute fibre reinforced green composites have been studied. These are based on Mesua ferrea L. seed oil-based poly(urethane ester) and poly(urethane amide) resin blends with commercially available partially butylated melamine-formaldehyde and epoxy resins by solution impregnation and hot-curing methods. The composites were cured at a temperature of about 130-140°C under a pressure of 35.5 kg cm for around 2 h.The physical, mechanical and chemical properties of the epoxy-modified polyurethane composites were better than those of the MF-modified composites. They also possessed excellent chemical resistance and hydrolytic stability in water, acid and salt solutions, making them useful for low load-bearing applications. 

Common matrix resins for blending with conducting polymers are widely used in traditional anticorrosion coatings, such as epoxy resin [25, 27, 32, 34, 68, 70, 71, 76], polyacrylic-based resin [24, 39, 48, 77, 78], and poly(methyl methacrylate) [30, 60, 62, 64]. The feature of matrix resin as well as the amount of ICPs is important to the anticorrosion performance of conductive composite coating. Samui and Phad-nis [67] blended various amounts of dioctyl phosphate (DOPH)-doped PANI with different polymeric matrices (epoxy resin, polyurethane resin, styrene-butyl acrylate... 

Imre et al. (2013) also prepared compatibilized blends of poly(lactic acid) with polyurethane elastomer by coupling reaction under extrusion conditions. Copolymer formation was shown by SEM, AFM, DMA, and mechanical property measurement. 

Other studies have focused on poly(dimethylsiloxane) blended with polycarbonates, ° polyisobutylene, poly(ethylene oxide), polyurethanes, epoxies,benzoxazines, and poly(hexylthiophene). ° In some cases, a polysiloxane oil was blended into polypropylene to facilitate its processing. A variety of other siloxane materials have been employed—for example, poly(diethylsiloxane), polyurethanes, fiuori-nated siloxane copoymers and fluororubbers in general, and trimethyl-siloxy silicates. ... 

Combinatorial libraries were employed to optimize microphase domain size and shape of polyethylene glycol (PEG) - poly(caprolactone) (PCL) polyurethanes, and their blends with PCL. Polyurethanes are used as biomaterials in a variety of applications, and the ability to tune microdomain size to enhance cell attachment is a desirable objective. These materials incorporate biocompatible PCL microdomains, to which cells can adhere, into a relatively non-adhesive PEG-PCL matrix. A region of chain extender composition and curing temperature, with controllable spherical-, wormlike-, and ribbon-shaped microdomains, was located through a series of increasingly focused libraries. Osteoblast-like cells (MC3T3-E1) cultured directly on selected libraries showed attachment density correlated with the distance to and size of nearby PCL microdomains. 

A variety of hydroxy-terminated unsaturated polyesters have been evaluated as intermediates in polyurethane foams.These intermediates include the ethoxylated or propoxylated derivatives of lignin-, sorbitol-pentaerythritol-MA condensation products. " MA has also been blended with poly(vinyl chloride) and diisocyanates to obtain cellular PVC materials. "- " ... 

PAS-FTIR spectroscopy has been widely applied to the study of photodegradation of polyethylene [9,13,126,487,1445], poly(vinyl chloride) [11, 1706], natural rubber [14], poly(butadiene-co-styrene) [7,8], poly(acryloni-trile-co-butadiene-co-styrene) blends with poly(vinyl chloride) [1706], polyurethanes [10,12], polyester-polyurethane coatings [394] and ablative decomposition of polymers [613,810]. 

Mechanical testing (strain-stress, tensile strength, elongation at break, elastic modulus, melt flow, viscoelastic properties, etc), have frequently been used in the study of the photodegradation of polyethylene [711, 1656, 1704, 1750, 1957, 2124, 2128], polypropylene [1750, 1899, 1903], poly(styrene) [748], poly(styrene-co-carbon monoxide) [1429], poly(styrene-co-acrylonitrile) [747], EPDM [896], poly(vinyl chloride) [806,1137,1138,1232,1748,1938], impact modified poly(vinyl chloride) [761, 764,1232], nylon 6 [672, 726, 727, 1395,1396,2300,2305], polyethylene blends with nylon 6 [506], and polyurethanes and its blends with poly(vinyl chloride), poly(vinyl alcohol), poly(vinyl acetate) and poly(vinyl chloride-co-vinyl acetate) [652]. 

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