Ether Copolymers

Perfluorinated ethylene—propylene copolymers, Tetrafluoroethylene—ethylene copolymers, Tetrafluoroethylene—perfluorovinyl ether copolymers, Poly(vinyl fluoride),... 

PFA Tetrafluoroethylene-perfluoroalkyl (usually propyl) vinyl ether copolymers ... 

Partially vulcanized EPDM/Poly- propylene blend" Completely vulcanized EPDM/Poly- propylene blend Neoprene vulcanizate Ester-ether copolymer thermoplastic elastomer ... 

Tetrafluoroethylene-Perfluoro(propyl vinyl ether) Copolymers (PFA)... 

Table 17 provides a list of various polysiloxane-poly(aryl ether) copolymers investigated. Depending on the type, nature and the level of the hard blocks incorporated, physical, thermal and mechanical properties of these materials can be varied over a very wide range from that of thermoplastic elastomers to rubber modified engineering thermoplastics. Resultant copolymers are processable by solution techniques and in some cases by melt processing 22,244). 

Siloxane-amide copolymers 30, 33 Siloxane-amide-imide copolymers 30 Siloxane-fary] ether) copolymers 43 - —, properties of 43,44 - —, synthesis of 43, 44 Siloxane-bismaleimides 35 Siloxane bond length of 6... 

Phase mixing can be attributed partly to the irregularity of the copolymer chain. In the case of poly(ester ether) copolymers synthesized by normal step polymerization reactions, the hard segment has a... 

Propylene Oxide-Allyl Glycidyl Ether Copolymer (PO, GPO).99... 

Tetrafluoroethylene-(TFE)-perfluoropropyl vinyl ether copolymers, 7 641 Tetrafluoroethylene-perfluorovinyl ether, 48 329-339. See also Teflon PFA copolymerization of, 48 330—331 Tetrafluoroethylene-perfluorodioxole copolymers, 48 339—342. See also Teflon AF copolymers applications of, 48 342 economic aspects of, 48 341—342 health and safety factors related to, 48 342 monomer preparation, 48 339 synthesis of, 48 339-340 Tetrafluoroethylene (TFE) copolymerization with... 

Crosslinking of amine- or hydroxy-terminated PAMAM dendrimers using cyclic anhydride - amine or cyclic anhydride - hydroxy addition reactions was employed for preparation of crosslinked thin films of very low permeability [73], Polyanhydrides, such as maleic anhydride-methyl vinyl ether copolymers, were used as crosslinking components. In the case of amine-terminated PAMAM, crosslinking and chemical stability were further increased by imidization of the maleamic acid groups retro-Michael eliminations were followed by Michael additions to further crosslink the film. 

Deimede, V. A. and Kallitsis, J. K. 2005. Synthesis of polyjarylene ether) copolymers containing pendant PEO groups and evaluation of their blends as proton conductive membranes. Macromolecules 38 9594—9601. 

Uses Anesthetics, sedatives, and cellulose ethers copolymer of 95% ethyl acrylate with 5% 2-chloroethyl vinyl ether is used to produce an acrylic elastomer. 

The imide-aryl ether copolymers were prepared via the poly(amic alkyl ester) route [53-56]. This intermediate route to polyimide is befleved to be more versatile than the poly(amic acid) analogue due to its enhanced solubility. Volksen et al. [53,54] reported that up to 75 % of a cosolvent could be used along with NMP, which is an important consideration in copolymerization of chemically dissimilar block copolymers. Furthermore, the poly(amic alkyl ester) precursor to the... 

Table 2 contains the characteristics of the amic ester-aryl ether copolymers including coblock type, composition, and intrinsic viscosity. Three series of copolymers were prepared in which the aryl ether phenylquinoxaline [44], aryl ether benzoxazole [47], or aryl ether ether ketone oligomers [57-59] were co-re-acted with various compositions of ODA and PMDA diethyl ester diacyl chloride samples (2a-k). The aryl ether compositions varied from approximately 20 to 50 wt% (denoted 2a-d) so as to vary the structure of the microphase-separated morphology of the copolymer. The composition of aryl ether coblock in the copolymers, as determined by NMR, was similar to that calculated from the charge of the aryl ether coblock (Table 2). The viscosity measurements, also shown in Table 2, were high and comparable to that of a high molecular weight poly(amic ethyl ester) homopolymer. In some cases, a chloroform solvent rinse was required to remove aryl ether homopolymer contamination. It should also be pointed out that both the powder and solution forms of the poly(amic ethyl ester) copolymers are stable and do not undergo transamidization reactions or viscosity loss with time, unlike their poly(amic acid) analogs.

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