Silphenylene-siloxane polymers

Previous reports from this laboratory described the preparation of silphenylene-siloxane polymers (I), in which both R and R are CH3, R = CH3 and R = CH = CH2, or R = CH3 and R = CeHs, by the low-temperature condensation polymerization of l,4-bis(hydroxydimethyl-... [Pg.742]

Hani Lenz Studies of Silphenylene-Siloxane Polymers... [Pg.743]

Preparation of Silphenylene-Siloxane Polymers. The basic reaction for the preparation of exactly alternating silphenylene-siloxane polymers from bis(ureido)silanes, Va-Vh, and the disilanol monomer is step-growth polymerization. This reaction was carried out at -20 °C, at which temperature the possible side reactions described previously can be prevented or at least decreased in rate. To obtain a high-molecular-weight polymer, a solution of the bis(ureido)silane monomer was added slowly to a slurry of the disilanol monomer in chlorobenzene (ii). After addition of 95%... [Pg.747]

Wang, S. Mark, J. E., An Experimental Study of the Unperturbed Chain Dimensions of Poly(Tetramethyl-p-silphenylene-siloxane). Polym. Bull. 1993,31, 205-211. [Pg.49]

Dorset, D. L. McCourt, M. P., Direct Phase Determination for Polymer Fibre X-ray Data—The Structure of Poly(tetrameth -p-silphenylene siloxane). Polymer 1997,38,1985-1988. [Pg.50]

Hani, R. Lenz, R. W., Synthesis and Properties of Silphenylene-Siloxane Polymers. In Silicon-Based Polymer Science. A Comprehensive Resource, Zeigler, J. M. Fearon, F. W. G., Eds. American Chemical Society Washington, DC, 1990 ... [Pg.107]

I ILPHENYLENE-SILOXANE POLYMERS (I) are, in a sense, modified polysi-loxanes in which every third siloxyl group in the main chain backbone is replaced by a suitable silphenylene group see structure on page 742). [Pg.741]

Merker, R. L., and M. J. Scoxx Random and block copolymers of poly-(tetramethyl-p-silphenylene-siloxane) and polydimethylsiloxane. J. Polymer ScL 2A, 31 (1964). [Pg.353]

Silarylene Polymers Containing m-Xvlvlene Units. A majority of the silarylene type siloxane polymers which have been worked on to date contain silicon-phenyl bonds. After an extensive literature search, only one type of polymer was found which contained an arylene group that does not have silphenylene bonds in the polymer backbone. The work, done mainly by Rosenberg and Choe 15-17 of the Air Force Materials Laboratory, is based on polymers which have a general structure as shown below, referred to as poly(m-xylylene-siloxanylenes), (9). [Pg.239]

ALTERNATIVE NAMES, TRADE NAMES Silphenylenes, silaiylene-siloxane polymers CLASS In-chain modified polysiloxanes... [Pg.821]

Professor of Polymer Chemistry, and Research Scientist, Michigan Molecular Institute, Midland Poly(amidoamine) dendrimers Poly(silphenylene-siloxanes)... [Pg.1005]

The synthesis and the properties of silphenylene-siloxanes have been summarized in a chapter of a monograph on silicon polymers [18] ... [Pg.6]

Dvornic, P. R. Owen, M. J., Poly(silphenylene-siloxanes). In Polymer Data Handbook, 2nd ed. Mark, J. E., Ed. Oxford University Press New York, 2009 pp 1022-1027. [Pg.49]

Merker, R. L. Scott, M. J., Preparation and Properties of Polyftetramethyl-p-Silphenylene-Siloxane). J. Polym. Sci., Part A Polym. Chem. 1964,2,... [Pg.49]

A different type of silicone polymer containing a ring in the chain, poly(tetra methyl-p-silphenylene siloxane), has amelting temperature of 160 °C, due in part to the aromatic ring in the backbone. There is, however, no indication that this polymer forms an anisotropic phase and the fusion parameters are normal ones.(169)... [Pg.301]

Polymer (B) poly(tetramethyl-p-silphenylene siloxane) 1986WUY... [Pg.451]

Fig. 9.59 Plot of temperature of maximum spherulite growth rate, Tmax, against equilibrium melting temperature. I m, for indicated polymers. (1) isotactic poly(styrene) (a) (2) poly(tetramethyl-p-silphenylene siloxane) (b) (3) poly(cis-isoprene) (c) (4) poly(caproamide) (d,e) (5) poly(L-lactic acid) (f) (6) poly(phenylene sulfide) (g,h) (7) poly(R-epichlorohydrin), poly(S-epichlorohydrin), poly(I-RS-epichlorohydrin) (i) (8) poly(ethylene terephthalate) (j,k,l) (9) poly(aryl ether ether ketone) (m,n) (10) poly(ethylene-2,6-naphthalene dicarboxylate) (n) (11) poly(3-hydroxybutyrate) (o) (12) isotactic poly(methyl methacrylate) (q) (13) poly(dioxolane) (r) (14) New TPI poly(imide) (s) (15) poly(methylene oxide) (t) (16) poly(cis-butadiene) (u) (17) poly(propylene oxide) (v,w) (18) poly(imide) BPDA - - 134 APB (x) (19) poly(imide) BPDA - -C12 (x) (20) syndiotactic poly(propylene) (y) (21) poly(3-hydroxy valerate) (z) (22) poly(ethylene succinate) (aa) (23) poly(aryl ether ketone ketone) (bb) (24) poly(phenylene ether ether sulfide) (cc) (25) poly(tetramethylene isophtha-late) (dd) (26) poly(hexamethylene adipamide) (e,ee) (27) poly(tetrachloro-bis-phenol-A adipate) (fQ nylon 6-10 (ee).

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