ETHYLENE TEREPHTHALATE COPOLYMER

Poly(ethylene oxide)—Poly(ethylene terephthalate) Copolymers. The poly(ethylene oxide)-poly(ethylene terephthalate) (PEO/PET) copolymers were first described in 1954 (40). This group of polymers was developed in an attempt to simultaneously reduce the crystallinity of PET, and increase its hydrophilicity to improve dyeabiHty. PEO/PET copolymers with increased PEO contents produce surfaces that approach zero interfacial energy between the implant and the adjacent biological tissue. The coUagenous capsule formed around the implant is thinner as the PEO contents increase. The stmcture of a PEO/PET copolymer is shown below ... [Pg.191]

Polyethyleneoxide-co-polypropyleneoxides, dispersants, S 710t Poly(ethylene oxide) film, physical properties of, 10 68It Poly(ethylene oxide) floe, 11 638 Poly(ethylene oxide)-poly(ethylene terephthalate) copolymers, bioresorbable polymers, 3 738 Poly(ethylene oxide) resins, molecular weight of, 10 684-685 Polyethylene oxides, dispersants, S 706t, 710t... [Pg.731]

NEW POLY(ETHYLENE TEREPHTHALATE) COPOLYMERS 6.4 TEREPHTHALATE RING SUBSTITUTIONS... [Pg.261]

Nagata M, Kitotsukuri T, Minami S, Tsutsumi N, Sakai W (1997) Enzymatic degradation of poly(ethylene terephthalate) copolymers with aliphatic dicarboxyUc acids and or poly(ethylene glycol). Eur Polym J 10 1701—1705... [Pg.16]

Table 15. Properties of blends of PCL with e-caprolactone-ethylene terephthalate copolymers data taken from [ 123] ...

An obvious need exists for membranes with improved permeability and permselectivity. In addition to several earlier pieces of work contained in ref. Zg and Zh studies involving radiation-modified poly(vinyl alcohol) ordered polycarbonates " and cellulosic ion-exchange membranes have been reported. A variety of reports have appeared of the evaluation of existing polymers, such as polysulphone, in biomedical applications for which they have not previously been used, and of the synthesis of new polymers which may find use in the biomedical area. Examples include polyorganophosphazenes, biodegradable poly(ethyene oxide)-poly(ethylene terephthalate) copolymers, collagen copolymers, block copolymers of l,4-bis(acryloyl) piperazine-AW -dimethylethylene diamine and styrene, and >olymers derived fi om a miscellany of heterocyclic monomers. Information on chemically modified polymers designed for biomedical use is also contained in Chapter 16 of this Volume. [Pg.428]

Kiyotsukuri, T., et ai, Poly(ethylene terephthalate) copolymers with a smaller amount of polyfethylene glycoDs and polyfbutylene glycoDs. Polymer, 36(13) p. 2629.1995. [Pg.426]

Poly(ethylene terephthalate) copolymers containing 1,4-cyclohexane dicarbox-ylate units. 41 1493-1501. [Pg.111]

Viscosity versus shear rate curves for two different compositions of a hydroxy benzoic acid/poly(ethylene terephthalate) copolymer (HBA/PET) at various temperatures were used [84] in the formation of the master rheogram for the liquid-crystalline polymer shown in Fig. 4.37. The data for 80 mole% of HBA at six different temperatures ranging from 275°C to 330 C were taken from Ref. 42. In order to eliminate operator and interlaboratory errors, the data on the same composition at one representative temperature of 275°C was also used from another source [85]. The other composition of HBA/PET chosen was 60 mole% and again from two different sources [42,86]. From one source [42], the viscosity data for 60 mole% of HBA at three different temperatures between 210°C and 300 C was used, where as from the other [86], three different temperatures between 260°C and 285 C was used. A total of 51 data points covering a shear-rate range from 2 to 8000/s have been included (Table B3 of Appendix B) in the unification process to form the master rheogram in Fig. 4.37. [Pg.162]

Zhuang P, Kyu T, White JL (1988) Characteristics of hydroxybenzonic acid-ethylene terephthalate copolymers and their blends with polystyrene, polycarbonate, and polyethylene terephthalate. In SPE ANTEC tech, papers, vol 34, p 1237... [Pg.264]

Ma D Z and Prud home R E (1990) Miscibility of caprolactone/ethylene terephthalate copolymers with chlorinated polymers a differential scanning calorimetry and Fourier-transform infrared study, Polymer 31 917-923. [Pg.107]

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