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Poly siloxane blends

SiHcone PSAs are blends or interpenetrating networks (IPNs) composed of a tackifyiag MQ resia cured ia a cross-linked poly(siloxane) aetwork. [Pg.57]

However, even at relatively low SAN levels, the blends can become hazy or opaque. Transparent compositions can be obtained by using a poly(siloxane)/PC copolymer instead of pure PC (25). Thin-walled articles can be successfully fabricated from such a composition. The SAN should not contain more than 25% of AN. [Pg.307]

It is surprising that poly(siloxane)/PC copolymer and SAN can form a transparent blend because the refractive index of poly(di-methyl siloxane) (PDMS) is around 1.4, which is very different from that of SAN (25). Moreover, PDMS can form a transparent blend with SAN that would not form a transparent blend with PC. Refractive indices of some polymers are summarized in Table 10.6. [Pg.307]

Table 3. Weight change incurred by homopolymers, poly(siloxane imide) segmented copolymers, and blends with polybenzimidazole due to exposure to high energy, high flux atomic oxygen3 ... Table 3. Weight change incurred by homopolymers, poly(siloxane imide) segmented copolymers, and blends with polybenzimidazole due to exposure to high energy, high flux atomic oxygen3 ...
Blend of poly(siloxane imide) copolymer (75%) and PBI (25%) total siloxane content 30% +2.95... [Pg.94]

Arnold CA, Chen DH, Chen YP, Waldbauer RO, Rogers ME, McGrath JE (1990) Miscible blends of poly(siloxane imide) segmented copolymers and polybenzimidazole as potential high performance aerospace materials. High Perfm Polym 2(2) 83... [Pg.104]

HuW et al. (1995) Interfacial tension reduction in polystyrene/poly(dimethyl-siloxane) blends by the addition of poly(styrene-b-dimethylsiloxane). Macromolecules 28(15) 5209—5214... [Pg.141]

Orrah DJ, Semiyen JA, Rossmurphy SB (1988) Studies of cyclic and linear poly(dimethyl-siloxanes). 28. Viscosities and densities of ring and chain poly(dimethylsiloxane) blends. Polymer 29 1455-1458... [Pg.202]

Storage modulus curves for polystyrene (PS)/poly(dlmethyl siloxane) (PDMS) films (a) without and (b) with 1.0 wt% cyclodextrin (CD) core. The solid lines represented samples with no PDMS. The initial and retained amounts of PDMS are shown in the insets for the other samples. (Reproduced from Busche, B. Tonelli, A. E., and Balik, C. M. 2010. Properties of polystyrene/poly(dimethyl siloxane) blends partially compatibiUzed with star polymers containing a y-cyclodextrin core and polystyrene arms. Polymer 51 6013-6020 with permission from Elsevier.)... [Pg.16]

Other studies have focused on poly(dimethylsiloxane) blended with polycarbonates, ° polyisobutylene, poly(ethylene oxide), polyurethanes, epoxies,benzoxazines, and poly(hexylthiophene). ° In some cases, a polysiloxane oil was blended into polypropylene to facilitate its processing. A variety of other siloxane materials have been employed—for example, poly(diethylsiloxane), polyurethanes, fiuori-nated siloxane copoymers and fluororubbers in general, and trimethyl-siloxy silicates. ... [Pg.45]

GOG Gogibus, N., Benmouna, F., Ewen, B., Pakula, T., Coqueret, X., Benmouna, M., and Maschke, U., Phase diagrams of poly(siloxane)/liquid ciystal blends, J. Polym. Sci. Part B Polym. Phys., 41, 39, 2003. [Pg.754]

Viscosities and densities of ring and chain poly(dimethyl siloxane) blends. Polymer, 29,1455-1458. [Pg.818]

Yamane H et al. Observation of deformation and recovery of poly(isobutylene) droplet in a poly(isobutylene)/poly(dimethyl siloxane) blend after application of step shear strain. J Rheol 1998 42(3) 567-580. [Pg.369]

Blending Studies of Poly(siloxane acetylene) and Poly(carborane siloxane acetylene)... [Pg.248]

High temperature thermosets and ceramics have been synthesized by heat treatment of various blends of poly (siloxane-acetylene) and poly (carborane-siloxane-acetylene). The polymeric blends give high char yields on pyrolysis, and the resultant chars show excellent oxidative stability to at least 1500 °C. The thermosets and ceramic chars show similar oxidative stability to previously studied copolymers containing varying amounts of siloxane, carborane, and acetylene units within the backbone. It has been determined that only a small percentage of carborane is necessary to provide this oxidation protection. Thus, these precursor linear hybrid polymers are more cost-effective than previous polymers which contained carborane in each repeating unit. [Pg.248]

Blends of PDMS27K-IP-B2 and a poly(ether-urethane) with the former as the minor component (1.6, 2.5, and 6.0 wt%) were prepared. The identical hard segments provide a driving force for compatibility between the two components and the disparity in the soft segment surface tensions ensures a surface enriched in siloxanes. Inclusion of poly(siloxane-urea-urethane) even at 1.6%... [Pg.81]

Figure 3. Typical UV absorption spectrum of D " or D "/D blend or a poly(dimethyl-diphenyl)siloxane oligomer (CHCl solution)... Figure 3. Typical UV absorption spectrum of D " or D "/D blend or a poly(dimethyl-diphenyl)siloxane oligomer (CHCl solution)...
See other pages where Poly siloxane blends is mentioned: [Pg.739]    [Pg.71]    [Pg.172]    [Pg.332]    [Pg.191]    [Pg.272]    [Pg.121]    [Pg.450]    [Pg.269]    [Pg.650]    [Pg.261]    [Pg.63]    [Pg.65]    [Pg.71]    [Pg.226]    [Pg.671]    [Pg.1]    [Pg.238]   
See also in sourсe #XX -- [ Pg.71 ]



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