Poly Epichlorohydrin-co-Ethylene Oxide

Poly(epichlorohydrin-co-ethylene oxide) has a well-balanced profile of physical properties together with a high resistance to solvents and oils at moderate temperatnres. For these reasons it has formd many applications in the aerospace and automotive industries. In addition, this copolymer has attracted attention in the field of batteries and electrical devices, mainly because, when complexed with an inorganic salt, the elastomer can be used 

Using the total ion current values obtained from sequence pyrolysis experiments, quantitative kinetic evaluation of the overall rate of production of volatile products was performed. The data leading to this overall rate constant were interpreted according to the Ericsson, Guggenheim and Kezdy-Jaz-Bruylants methods. 

Reprinted from [a.14] with permission from Elsevier 

---

Poly(epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) [26587-37-1... 

ELASTOMERS,SYNTHETIC - POLYETHERS] (Vol 8) Poly(epichlorohydrin-co-ethylene oxide) [24969- 10-6]... 

VC/Polyepichlorohydrin and VC/Poly (epichlorohydrin-co-ethylene oxide) Graft Copolymers. Graft copolymers of this type with high backbone-polymer content should be useful PVC additives. 

VC/Polyepichlorohydrin and VC/Poly(epichlorohydrin-co-ethylene oxide) Graft Copolymers. Alloys of PVC and graft copolymers of this type with high backbone-polymer content give interesting results in the field of bottle blowing (12). The combination of transparency and impact strength that can be realized with these compositions should enable them to penetrate into the field covered at present by PVC-MBS mixtures. 

De Paoli and coworkers7 have used the more soluble poly(o-methoxyaniline) doped with p-toluene sulfonic acid to prepare a composite blend with poly(epichlorohydrin-co-ethylene oxide), but conductivities were relatively low (10-3 S cm-1) even with a high 50% (w/w) conducting polymer loading. 

De Paoli, M.-A. and D.J. Maia. 1994. Polypyrrole-poly(epichlorohydrin-co-ethylene oxide) blend An electroactive, electrochromic and elastomeric material. / Mater Chem 4 1799-1803. 

Alkaline PEO-based SPE may be limited by the high crystallinity and poor thermal stability. Vassal et al. [11] intended to use amorphous copolymer, poly(epichlorohydrin-co-ethylene oxide) P(ECH-co-EO), and presented good electrochemical properties without PEO s disadvantages. The ionic conductivity value at room temperature was around 10 S cm". The all solid-state alkaline Ni/MH and Zn/air electrochemical cells also exhibited stable behavior. 

Synthetic rubbers are produced as commodities. Polybutadiene, polybutylene, polychloroprene and polyepichlorohydrin are examples of elastomeric homopolymers. Copolymeric rubbers comprise poly-(butadiene-co-styrene), poly(butadiene-co-acryloni-trile), poly(ethylene-co-propylene-co-diene), and poly-(epichlorohydrin-co-ethylene oxide). The unsaturated group in the comonomer provides reactive sites for the crosslinking reactions. Copolymers combine resilience with resistance to chemical attack, or resilience in a larger temperature range, and thermoplastic-like properties. There are several studies in the literature describing the preparation of blends and composites of elastomers and conductive polymers. A description of some significant examples is given in this section. 

Scheme 30. Two possible reaction pathways for the formation of the main volatile pyrolysis products of poly(epichlorohydrin-co-ethylene oxide)...

Elastomeric copolymer from epichlorohydrin and ethylene oxide Poly(carbon monoxide-co-polyolefin)... 

C. Charmette, J. Sanchez, P. Gramain, A. Rndatsikira, Gas transport properties of poly (ethylene oxide-co-epichlorohydrin) membranes, J. Membr. ScL, 230, 161-169 (2004). 

Duck et al. [292] have reported that poly(ethylene oxide-co-epichlorohydrin containing LiC104 has a desirable transparency and ionic conductivity at room temperature to be used as a solid electrolyte in electrochromic devices. These authors have used polyaniline and Prussian blue as an electrochromic material and have characterized the device by doublestep spectrochronoamperometry using monochromatic light at 650 nm. 

H.D. Polyethylene Poly(ethylene-co-vinyl acetate) Epichlorohydrin-ethylene oxide copolymer... 

Elastomeric copolymer from ethylene oxide and epichlorohydrin, chloromethy-loxirane (ANSI/ASTM) see also CHC Poly(ethylene-co-chlorotrifluoroethylene) see also E-CTFE... 

A solid-state supercapadtor with alkaline polymer electrolyte was reported for the first time by Lewandowski et al The polymer electrolyte was based on PEO-KOH-H2O. It served as both separator and binder for the electrode material. The selection of PVA was based on the fact that polymers like PVA, PEO and co-poly(epichlorohydrin-ethylene oxide) showed conductivity in the range of 10" S/cm. The separator was made by film casting from an aqueous solution of PEO and KOH in which the concentration of KOH was fixed at 40 wt% in the PEO so that the optimum mechanical strength of the film and conductivity was maintained. To make the electrodes, the PEO/KOH solution was mixed with activated carbon and acetylene black. A capacitance of 90 F/g for the activated carbon was reported and the capadtance values were comparable to that of the KOH electrolyte. The absence of any peak indicated pure electrostatic attraction in the capacitor behavior. When the system was studied at sweep rates higher than 20 mV/s, an appreciable decrease in capacitive behavior was observed due to ohmic drop. From the impedance measurement, the resistance was found to be around 0.77 ohm. The approximately calculated RC time constant was around 1.4 s. 

Solid polymer electrolyte (SPE) based on random co-polymer poly (ethylene oxide) and epichlorohydrin (P(EO-EPI))... 

---