Poly -urea-urethane copolymers

WYNNE ET AL. Poly(dimethysUoxane)—Urea—Urethane Copolymers... [Pg.65]

A series of poly(ester-urethane) urea triblock copolymers have been synthesized and characterized by Wagner et al/ using PCL, polyethylene glycol, and 1,4 diisocyanatobutane with either lysine ethyl ester or putrescine, as the chain extender. These materials have shown the elongation at break from 325% to 560% and tensile strengths from 8 to 20 MPa. Degradation products of this kind of materials did not show any toxicity on cells. [Pg.237]

The principal kinds of thermoplastic resins include (1) acrylonitrile-butadiene-styrene (ABS) resins (2) acetals (3) acrylics (4) cellulosics (5) chlorinated polyelliers (6) fluorocarbons, sucli as polytelra-fluorclliy lene (TFE), polychlorotrifluoroethylene (CTFE), and fluorinated ethylene propylene (FEP) (7) nylons (polyamides) (8) polycarbonates (9) poly elliylenes (including copolymers) (10) polypropylene (including copolymers) ( ll) polystyrenes and (12) vinyls (polyvinyl chloride). The principal kinds of thermosetting resins include (1) alkyds (2) allylics (3) die aminos (melamine and urea) (4) epoxies (5) phenolics (6) polyesters (7) silicones and (8) urethanes,... [Pg.1316]

Careful XPS analysis of a series of poly(dimethylsiloxane-urea-urethane) multiblock copolymers demonstrated that, as well as a surface layer of siloxane, there was a layer enriched in the hard block immediately beneath this. The thickness of both these layers depended on the molecular weights of the soft and hard block segments, respectively112. Annealing of these copolymers increased the thickness of both layers. The same authors have also shown that the thickness of these layers of hard and soft blocks could be modified by use of solvent mixtures which selectively precipitate the polar hard block during film formation by solvent casting113. [Pg.2236]

Pike, J.K., Ho, T., Wynne, K.J. Water-induced surface rearrangements of poly(dimethylsi-loxane—urea—urethane) segmented block copolymers. Chem. Mater. 8, 856-860 (1996)... [Pg.141]

Garrett J, Runt 1, Lin 1. Microphase separation of segmented poly(urethane urea) block copolymers. Macromolecules 2000 33(17) 6353-9. [Pg.20]

Brunstedt MR, Ziats NP, Robertson SP, Hiltner A, Anderson JM, Lodoen GA, et al. Protein adsorption to poly(ether urethane ureas) modified with acrylate and methacrylate polymer and copolymer additives. J Biomed Mater Res 1993 27(3) 367-77. [Pg.347]

Miller CE, Edelman PG, Ratner BD, Eichinger BE. Near-infrared spectroscopy analyses of poly(ether urethane urea) block copolymers. Part I Bulk composition. Appl Spectrosc 1990 44 576-580. [Pg.130]

Garrett, J. T., Lin, J. S., Runt, J. (2002), Influence of preparation conditions on microdomain formation in poly(urethane urea) block copolymers. Macromolecules, 35,161-8. Garrett, J. T., Xu, R., Cho, J., Runt, J. (2003), Phase separation of diamine chain-extended poly(urethane) copolymers FT-IR spectroscopy and phase transitions. Polymer, 44, 2711-19. [Pg.15]

Garrett, J. T, Lin, J. S., Runt, J. (2002), Influence of preparation conditions on microdomain formation in poly(urethane urea) block copolymers. Macromolecules, 35,161-8. [Pg.44]

Garrett J T, Runt J and Lin J S (2000) Microphase Separation of Segmented Poly(urethane urea) Block Copolymers, Macromolecules 33 6353-6359. [Pg.104]

Garrett J T, Runt J and Siedlecki C A (2001) Microdomain Morphology of Poly(urethane urea) Multiblock Copolymers, Macromolecules 34 7066-7070. [Pg.104]

The polyaddition reaction bonding HS to SS by means of chain extenders is a stochastic process. This aspect, as well as the rather wide molecular weight distributions of component segments, is the natural explanation for both a broad dispersion of the size of HS microdomains separated by a continuous SS phase, and a fairly low DMS [29,30]. Runt and coworkers pointed out that poly(urethane urea) multiblock copolymers have relatively low overall DMS (20-40%), in contrast to the common notion that these copolymers are well phase-separated materials [31]. [Pg.389]

Sheth JP, Wilkes GL, Fornof AR, Long TE, Yilgor I. Probing the hard segment phase coimec-tivity and percolation in model segmented poly(urethane urea) copolymers. Mactomolecules 2005 38 5681-5685. [Pg.100]

PS PSF PSU PTFE PU PUR PVA PVAL PVB PVC PVCA PVDA PVDC PVDF PVF PVOH SAN SB SBC SBR SMA SMC TA TDI TEFE TPA UF ULDPE UP UR VLDPE ZNC Polystyrene Polysulfone (also PSU) Polysulfone (also PSF) Polytetrafluoroethylene Polyurethane Polyurethane Poly(vinyl acetate) Poly(vinyl alcohol) poly(vinyl butyrate) Poly(vinyl chloride) Poly(vinyl chloride-acetate) Poly(vinylidene acetate) Poly(vinylidene chloride) Poly(vinylidene fluoride) Poly(vinyl fluoride) Poly(vinyl alcohol) Styrene-acrylonitrile copolymer Styrene-butadiene copolymer Styrene block copolymer Styrene butadiene rubber Styrene-maleic anhydride (also SMC) Styrene-maleic anhydride (also SMA) Terephthalic acid (also TPA) Toluene diisocyanate Ethylene-tetrafluoroethylene copolymer Terephthalic acid (also TA) Urea formaldehyde Ultralow-density polyethylene Unsaturated polyester resin Urethane Very low-density polyethylene Ziegler-Natta catalyst... [Pg.960]

Some authors combined the IPN concept with the use of compatibi-lizers similar to that mentioned in Section 2. These may be a coupling agent such as epoxy-functionalized polysiloxane, polysiloxane copolymers or an organofunctional grafted polyolefin such as poly(ethylene-co-methacrylate) or MA-g-EPDM (maleic anhydride grafted EPDM) [124,125, 133]. Knaub et al. [150] studied a poly(urethane-ureas)/PDMS semi-IPN in... [Pg.138]

Knaub P, Camberlin Y (1988) Gerard JF, New reactive polymer blends based on poly(urethane ureas) (PUR) and polydisperse poly(dimethylsiloxane) (PDMS) control of morphology using a PUR-b-PDMS block copolymer. Polymer 29(8) 1365-1377... [Pg.148]

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