Graft poly ethyl

The elastomers exhibited rubber-like behavior. From an examination of electron photomicrographs of cross sections of the elastomers, the fibrillar structure of the cellulose fibers apparently formed a network, and poly (ethyl acrylate) was distributed uniformly among the fibrils. The rigid crystalline regions of the cellulose fibers apparently stabilized the amorphous, grafted poly (ethyl acrylate) to determine the mechanical properties of the elastomers (43, 44). For example, typical elastic recovery properties for these elastomers are shown in Table X. 

Yoshikawa, M. and Kitao, T. 1997. Speciality of polymeric membranes-VI. Pervaporation separation of benzene/cyclohexane mixtures through nylon 6-graft-poly(ethyl methacrylate) membranes. 33 25-31. 

Poly [dimethylsiloxane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethylene glycol) methyl ether. See DImethylsIloxane/EO copolymer Poly [dimethylsiloxane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethyl-ene/propylene glycol). See Dimethylsiloxane/EO-PO copolymer Polydimethylsiloxane elastomer. See Silicone elastomer Polydimethylsiloxane/EO-PO copolymer. See Dimethylsiloxane/EO-PO copolymer... 

The structure-property relationship of graft copolymers based on an elastomeric backbone poly(ethyl acry-late)-g-polystyrene was studied by Peiffer and Rabeony [321. The copolymer was prepared by the free radical polymerization technique and, it was found that the improvement in properties depends upon factors such as the number of grafts/chain, graft molecular weight, etc. It was shown that mutually grafted copolymers produce a variety of compatibilized ternary component blends. 

Several attempts have been made to superimpose creep and stress-relaxation data obtained at different temperatures on styrcne-butadiene-styrene block polymers. Shen and Kaelble (258) found that Williams-Landel-Ferry (WLF) (27) shift factors held around each of the glass transition temperatures of the polystyrene and the poly butadiene, but at intermediate temperatures a different type of shift factor had to be used to make a master curve. However, on very similar block polymers, Lim et ai. (25 )) found that a WLF shift factor held only below 15°C in the region between the glass transitions, and at higher temperatures an Arrhenius type of shift factor held. The reason for this difference in the shift factors is not known. Master curves have been made from creep and stress-relaxation data on partially miscible graft polymers of poly(ethyl acrylate) and poly(mcthyl methacrylate) (260). WLF shift factors held approximately, but the master curves covered 20 to 25 decades of time rather than the 10 to 15 decades for normal one-phase polymers. 

Elastomers, prepared by free-radical initiated copolymerization of ethyl acrylate with cellulose to several hundred percent extent of grafting of poly (ethyl acrylate) onto cellulose, exhibited rubber-like behavior and second-order transition temperatures. Cellulose-poly (ethyl acrylate) elastomers had transition temperatures below —35°C, about — 20°C, and below 5°C when measured in ethyl acetate, dry air, and water, respectively (43, 44). 

Table X. Effects of Degree of Polymerization of the Irradiated Cellulose and Extent of Grafting on the Elastic Recovery Properties of Fibrous Cellulose—Poly (ethyl acrylate) at 25°C...

Other examples of solvent effects in casting blends include epoxy resin/copoly-ester/tetrachloroethane polyethersulphone/poly(ethylene oxide)/cyclohexanone and mixtures of PVC with various polyacrylates in solvents such as THF One particular pair of polymers PVC/poly(ethyl acrylate) appear to be miscible but no suitable solvent has been found as yet. Homogeneous blends can only be prepared by in situ polymerisation though it is possible that miscibility is enhanced by small amounts of graft copolymer which is inevitably formed by this technique. 

Some two stage emulsion graft copolymer materials synthesized and characterized by DMS include) the series poly (methyl methacrylate)/poly(n-butyl acrylate) (PMMA/ PnBA) synthesized by Dickie (14) and the series poly(ethyl methacrylate)/poly(n-butyl acrylate) (PEMA/PnBA) synthesized by Sperling et al. (1) The present study will continue the development of the PEMA/PnBA damping materials by incorporating a common comonomer) ethyl acrylate (EA)) in both stages of the emulsion polymerization. 

Poly([ethyl acrylate]-g-plvalolactone) was found to be easily processable on conventional rubber working equipment. It was easily processable on a two-roll mill, had excellent calendering properties, could be compression molded at 225-230°C, and could be Injection molded at 225°C. Extrusion was more difficult requiring high temperatures (250°C) and slow extrusion rates. Physical properties of the graft copolymers were similar to those of the parent elastomeric polyacrylates that had been compounded with carbon block and chemically crossllnked. 

Acrylate rubbers such as poly (butyl acrylate) or poly (ethyl hexylacrylate) are characterized by better aging characteristics than polydienes. Ethyl hexylacrylate and acrylonitrile were grafted onto PVC in solution by R. G. Bauer and M. S. Guillord. They observed that this graft copolymer was transparent in contrast to a mere polyblend of PVC and an AN/acrylate copolymer. 

Kang FIL, Liu WY, Fie BQ, Shen D, Ma L, Huang Y (2006) Synthesis of amphiphilic ethyl cellulose grafting poly(acrylic acid) copolymers and their self-assembly morphologies in water. Polymer 47 7927-7934... 

Kang HL, Liu RG, Huang Y (2013) Synthesis of ethyl cellulose grafted poly(Ai-isopropyla-crylamide) copolymer and its micellization. Acta Chim Sin 71 114-120... 

Zampano, G., Bertoldo, M., Bronco, S., (2009) Poly(ethyl acrylate) surface-initiated ATRP grafting from Wood pulp cellulose fibers. Carbohydrate Polymers, Vol. 75, No. 1, Qanuary 2009), pp 22-31, ISSN 0008-6215. 

The most important compounds are polyetherols, polyesterols, and graft polyols (Figure 1). Polyetherols are the most common polyols and most commercial products are made chiefly from ethylene oxide and propylene oxide. Polyesterols are widely used in elastomeric polyurethanes. Typical compounds are aliphatic polyesters, such as poly(ethyl-ene adipate), made so that there are only hydroxyl end groups, with no residual acid groups. Graft polyols (also called polymer polyols) consist of a matrix of a conventional polyol, which also contains rubbery (such as styrene/acrylonitrile copolymer) particles chemically bound to polyol molecules. These grafted particles reinforce the final polyurethane, giving improved physical properties. 

K. Aoi, A. Takasu, M. Tsuchiya, and M. Okada, New chitin-bcised polymer hybrids, 3. Miscibihty of chitin-graft-poly(2-ethyl-2-oxazoline) with poly(vinyl alcohol). Macromol. Chem. Phys. 199, 2805-2811 (1998). 

Journal of Applied Polymer Science 80, No.7, 16th May 2001, p.903-12 SYNTHESIS, CHARACTERIZATION, AND PROPERTIES OF AMPHIPHILIC POLY(ETHYL ACRYLATE) WITH UNIFORM POLYOXYETHYLENE GRAFTS Xie H-Q Liu Y... 

A. Guyot, Poly(ethyl acrylate) latexes encapsulating nanoparticles of silica. 2. Grafting... 

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