Epichlorohydrin homopolymer

Formulations of Epichlorohydrin Homopolymer and Ethylene-Acrylic Elastomers... 

Figure 4. Volume change of elastomers as a function of MTBE concentration in Indolene HO-III. Key o.fluorocarbon , epichlorohydrin homopolymer a, chlorosulfonated polyethylene and o, EPDM.

Qualitatively MTBE Is estimated to have an overall solubility parameter value close to that of Indolene, but has higher polar and hydrogen bonding forces. As a result polar polymers such aa fluorocarbon, epichlorohydrin homopolymer and chlorosulfonated polyethylene tend to swell to a greater extent In MTBE rich mixtures, while nonpolar EPDM elastomer swells to a lesser extent In these mixtures. The very large swell of the fluorocarbon In MTBE Is not surprising since other ethers such as diethyl ether and dioxane are known to swell the fluorocarbon to a large extent [3]. 

The A and B cure systems can be used in epichlorohydrin homopolymer (CO). The B and D cure systems can be used in unsaturated terpolymers (GECO). In addition, GECO can be cured with sulfur and peroxide cure systems. 

Epichlorohydrin. Commercial polyester elastomers include both the homopolymer and the copolymer of epichl orohydrin with ethylene oxide. The very polar chloromethyl groups create basic resistance to oil for these polymers, and they have been extensively used in fuel lines however, the desire for lower fuel permeation is causing a search to be made for other polymers (10) (see Elastomers, synthetic-polyethers). 

Epichlorohydrin (ECO) has exceUent resistance to fuel and oil sweU. The ECOs show a volume sweU of 35% at room temperature compared to 70% for a medium ACN—nitnle mbber in ASTM Reference Fuel C. The copolymer has a low temperature britde point of —40° C and the homopolymer,... 

Epichlorohydrin Elastomers without AGE. ECH homopolymer, polyepichlorohydrin [24969-06-0] (1), and ECH—EO copolymer, poly(epichlorohydrin- (9-ethylene oxide) [24969-10-6] (2), are linear and amorphous. Because it is unsymmetrical, ECH monomer can polymerize in the head-to-head, tail-to-tail, or head-to-tail fashion. The commercial polymer is 97—99% head-to-tail, and has been shown to be stereorandom and atactic (15—17). Only low degrees of crystallinity are present in commercial ECH homopolymers the amorphous product is preferred. 

Crystallinity is low the pendent allyl group contributes to the amorphous state of these polymers. Propylene oxide homopolymer itself has not been developed commercially because it cannot be cross-baked by current methods (18). The copolymerization of PO with unsaturated epoxide monomers gives vulcanizable products (19,20). In ECH—PO—AGE, poly(ptopylene oxide- o-epichlorohydrin- o-abyl glycidyl ether) [25213-15-4] (5), and PO—AGE, poly(propylene oxide-i o-abyl glycidyl ether) [25104-27-2] (6), the molar composition of PO ranges from approximately 65 to 90%. 

In contrast to the substituted PPO s, It Is theoretically possible to obtain the same substituted PECH s by homopolymerization of the corresponding mesogenic oxirane, or by its copolymerization with epichlorohydrin. We have attempted these polymerizations in order to better interpret the thermal behavior of the more complicated copolymers that we have obtained by polymer analogous reactions. Homopolymerization would be instructive because the incorporation of nonmesogenic units into liquid crystalline homopolymers doesn t as a rule change the type of mesophase obtained (5). 

Another commercial application of organoaluminum compounds is as catalysts for the ring-opening polymerization of epoxides to form homopolymers of epichlorohydrin (ECH) and copolymers and terpolymers of ECH, ethylene oxide, propylene oxide, and allyl glycidyl ether.The resulting... 

Colominic acid, a homopolymer of iV-acetylneuraminic acid, has been mixed with soluble starch and cross-linked with epichlorohydrin to form a matrix suitable for the affinity chromatographic purification of neuraminidase. ... 

Acetal homopolymer Animal glue Calcium resinate 1-Decene, homopolymer, hydrogenated Glyceryl rosinate Hydrogenated rosin Methyl rosinate Pentaerythrityl rosinate Polyethylene, chlorosulfonated Polyphenylene ether Potassium rosinate Sodium rosinate Tall oil rosin Vinylidene chloride/methyl acrylate/methyl methacrylate copolymer food-contact articles, for repeated use Butadiene/acrylonitrile copolymer EPM rubber Epoxy, bisphenol A/epichlorohydrin Ethylene/propylene/dicyclopentadiene terpolymer Hexafluoropropylene/vinylidene fluoride copolymer Hexafluoropropylene/vinylidene fluoride/tetrafluoroethylene terpolymer Hydrogenated butadiene/acrylonitrile... 

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