Copolyether ester

These materials are segmented copolyether esters formed by the melt transesterification of dimethyl terephthalate, poly(tetramethylene ether) glycol and 1,4-butane diol. As with the thermoplastic polyurethanes, one can describe a hard segment and a soft segment, the hard segments forming crystalline areas which act as pseudocrosslinks . [Pg.121]

The following gives representative properties of the copolyether esters ... [Pg.121]

These materials exhibit the same type of morphology as the copolyether esters, the polyamide providing the hard segment, and the polyester the soft elastomeric phase. The service temperature is lower than that of the copolyether esters, but apart from this difference they exhibit similar properties. [Pg.122]

Sasaki, K. Yazaki, Y Block Copolyether Ester Compositions. Japanese Patent No. 61,091,245, May 9 Showa, 1986. [Pg.2540]

To a degree, the mechanical properties of copolyether esters depend upon the conditions under which the sample is allowed to crystallize. Polymers having 4GT hard segments crystallize very rapidly compared with some other terephthalate copolymers. This is apparent from the rate of hardness development of injection-molded samples. Figure 17 compares the hardness of injection moldings at a 57% 4GT/PTMEG-T copolymer with that of a 2GT copolymer at various times after ejection... [Pg.67]

Figure 17. Hardening rate of injection-molded samples of copolyether esters. Melt temperature is 240°C mold temperature is 30°C 58% 4GT/PTMEG-T (A), 56% 2GT/PTMEG-T (B)...

Copolyether-Ester Block Copolymers for Thermo-Responsive Controlled Delivery Systems... [Pg.52]

Uses Prod, of thermoplastic PU, PU casting elastomers, coatings, adhesives, syn. leather, copolyether esters and amides Manuf./Distrib. Aldrich http //www.sigma-aldrich.com] CarboMer http //www.carbomer.com] Fluka http //www.sigma-aldrich. com Trade Name Synonyms Poly THF t[BASF AG http //WWW. basf. de]... [Pg.3585]

Copolyether ester elastomers Thermoplastic Polyurethanes SCyrene Butadiene Styrene block copolymers. [Pg.402]

Tsai, R.S. and Y.D. Lee, S)mthesis and characterization of block copolyether-esters with poly(tetramethylene 2,6-naphthalenedicarboxylate) segments. journal of Applied Polymer Science, 66(7) p. 1411.1997. [Pg.422]

Sivaraman, R, et ai. Thermoplastic copolyether ester elastomer toughened polycarbonate blends 2. Thermal and rheological studies. Polymer Tesfm, 23(6) p. 645. 2004. [Pg.426]

A carboxyl-terminated unsaturated polyester was esterified with poly(oxy-ethylene) diols [70]. Using poly(oxyethylene) diol with a munber average molecular weight of 2000, partly crystalline block copolymers were obtained. The unsaturated block copolyether ester contained predominantly one terminal polyether group per molecule. Block unsaturated copolyetheresters with shorter poly(oxyethylene) terminal groups of M = 350 and 550 were also obtained. The effect of the composition of those UPRs on the mechanical and thermal properties was investigated [70]. The block copolyetherester with Mn = 2000 can be dissolved in styrene monomer, thus forming a UPR with acceptable viscosity at as little as 20% styrene. [Pg.35]

Stevenson J C and Cooper S L (1988) Multiple endothermic melting behavior in poly(tetramethylene terephthalate)-containing polyesters and block copolyether-esters, J Polym Sci B Polym Phys Ed 26 953-966. [Pg.109]

Castles J L, Vallance M A, Mckenna J M and Cooper S L (1985) Thermal and mechanical properties of short-segment block copolyesters and copolyether-esters, J Polym Sci Polym Phys Ed 23 2119-2147. [Pg.109]

Comments Lomod is a copolyether-ester or polyether-polyester block copolymer (CPEE). FR = flame retardant, HS = heat stabilized. ... [Pg.347]

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