Copolymers ethylene oxide-dimethylsiloxane

Unless noted otherwise, the reactants were obtained from Aldrich Chemical Company, Milwaukee, Wisconsin and were used as received. The ethylene oxide-dimethylsiloxane-ethylene oxide ABA block copolymer was obtained from Petrarch Systems, Inc., Bristol, PA. 

The infrared spectra of the ethylene oxide-dimethylsiloxane-ethylene oxide ABA block copolymer was also studied. Band assignments are based on the spectra of the reactants and previous work (6, 14). Following are some assignments for the product. Bands corresponding to the Si-0 stretching mode occur at 1090. The Si-R stretching and rocking modes occur at about 1257 and 806 respectively. The Si-O, C-0 stretch appears at 1093. 

YAN Yang, J., Wegner, G., and Koningsveld, R., Phase behavior of ethylene oxide-dimethylsiloxane PEO-PDMS-PEO triblock copolymers with water, Colloid Polym. ScL, 270, 1080, 1992. 

Ethylene oxide/dimethylsiloxane triblock copolymer water 92YAN... 

A. Mayer et al. examined poly(dimethylsiloxane)-bIock-poly(ethylene oxide) (PDMS-b-PEO), poly(styrene)-f)Iock-poly(ethylene oxide) (PS-b-PEO), polystyrene-block-poly(methacryhc acid) (PS-b-PMAA) as amphiphihc block copolymers with regard to their properties in stabilizing colloidal metal nanoparticles [37, 49]. All three polymers are successfully used to stabihze various transition metal coUoids... 

S-DMS refers to styrene-dimethylsiloxane diblock copolymers S-l refers to sty-rene-isoprene diblock copolymers S-l-S and I-S-I refer to styrene-isoprene-styrene and to isoprene-styrene-isoprene triblock copolymers, respectively and S-EO and EO-S-EO refer to styrene-ethylene oxide diblock copolymers and to ethylene oxide-styrene-ethylene oxide triblock copolymers, respectively. 

Learning that efficient ion transport depended on segmental motion of the host polymer chains, it became clear that one approach to increasing conductivity would be to search for low glass transition flow-Tg) materials. 7g may be reduced by incorporation of plasticising components in various ways, e.g. by using copolymers of ethylene oxide and dimethylsiloxane for the host polymer ... 

Examples of copolymers with practical use between two different carbonates are poly[2,2-propanebis(4-phenyl)carbonate]-Woc/c-poly[2,2-propanebis[4-(2,6-dimethylphenyl)]carbonate], poly [1,1-cyclohexane bis(4-phenyl)carbonate]-co-[2,2-propane bis(4-phenyl)carbonate], and poly [1,1-dichloroethylene bis(4-phenyl)carbonate]-co-[2,2-propane bis(4-phenyl)carbonate]. Examples of copolymers between a carbonate and an ester are poly[4,4 -(1-methylethylidene)bis[phenol]-co-1,3-benzenedicarboxylic acid-co-carbonic acid], poly[4,4 -(1-methylethylidene)bis[phenol]-co-1,4-benzenedicarboxylic acid-co-carbonic acid], etc. Other known copolymers include poly[2,2-propanebis(4-phenyl)carbonate]-b/oc/(-poly(ethylene oxide), poly[2,2-propanebis(4-phenyl)carbonate]-Woc/c-polysulfone, poly[2,2-propanebis(4-phenyl)carbonate]-b/oc/c-poly(dimethylsiloxane), poly[2,2-propanebis(4-phenyl)carbonate]-b/oc/c-poly(methyl methacrylate), etc. These copolymers have in general good thermal resilience and decompose similarly to other polycarbonates [23]. 

In another approach, inorganic-organic hybrid template molecules such as poly(dimethylsiloxane)-Z)-poly(ethylene oxide) block copolymers were applied (Figure 35.5). These amphiphilic molecules offer the interesting possibility of... 

HAE Haesslin, H.-W., Dimethylsiloxane-ethylene oxide block copolymers. 2. Preliminary results on dilute solution properties, Ma ro/wo/. Chem., 186, 357, 1985. 

H.W. Haesslin, H.F. Eicke and G. Riess, Dimethylsiloxane-ethylene oxide block copolymers,... 

Poly(dimethylsiloxane)-g-poly(ethylene oxide) graft copolymer... 

CAS 11272-76-1 27306-78-1 68937-54-2 68938-54-5 Synonyms Dimethylsiloxane-ethylene oxide block copolymer 2-[Methoxy (polyethyleneoxy) propyl] heptamethyltrisiloxane Poly [dimethylsilox-ane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethyleneglycol) methyl ether... 

Synonyms Dimethylsiloxane (propylene oxide-ethylene oxide) block copolymer Poly [dimethylsiloxane-co-methyl (3-hydroxypropyl) siloxane-graft-poly (ethylene/propylene glycol) Polydimethylsiloxane/EO-PO copolymer Siloxanes and silicones, dimethyl, 3-hydroxypropyl methyl, ethoxylated, propoxylated ClassiTication Silicone... 

Dimethylsiloxane-ethylene oxide block copolymer. See Dimethylsiloxane/EO copolymer... 

Very recently, Liu reported [38, 39] on the one-pot preparation of ordered mesoporous carbon with triblock copolymer PEO-PPO-PEO using a diblock copolymer poly(dimethylsiloxane)-poly(ethylene oxide) (PDMS-PEO) (M = 3012,... 

Dimethylsiloxane (propylene oxide-ethylene oxide) block copolymer. See Dimethylsiloxane/EO-PO copolymer Dimethyl siloxy stearoxy siloxane polymer. See Stearoxy dimethicone Dimethylsilyl ether. See 1,1,3,3-Tetramethyldisiloxane Dimethyl soya alkyl ammonium chloride Dimethyl soy alkyl ammonium chloride. See Disoyadimonium chloride Dimethyl soyamine... 

Enzymes, mammalian placenta Enzymes, placental. See Placental enzymes EO. See Ethylene oxide E.O.D.. See Octyldodecyl erucate EO/dimethylsiloxane/EO block copolymer CAS 68937-54-2... 

Similar enrichment of siloxane units occurs at the surfaces of block copolymers or even random copolymers containing PDMS sequences. Examples are poly(dimethylsiloxane-i-ethylene oxide) and poly(dimethylsiloxane-f)-imide) multi-block copolymers, poly(dimethylsiloxane)/imine copoly-mers, and poly(urethane-dimethylsiloxane) anionomers. Other materials, such as long-chain alkenes and highly branched polymer additives exhibit surface segregation. Much of the information on these changes in surface composition has been obtained by measurements of contact angles. 

Vuckovic, M. V. Antic, V. V. Govedarica, M. N. Djonlagic, J., Synthesis and Characterization of Copolymers Based on Poly(hutylene terephthalate) and Ethylene Oxide-Poly(dimethylsiloxane)-Ethylene Oxide. J.Appl. Polym. Sci. 2010,115, 3205-3216. 

Klasner, S. A. Metto, E. C. Roman, G. T. Culbertson, C. T., Synthesis and Characterization of a Poly(dimethylsiloxane)-Poly(ethylene oxide) Block Copolymer for Fabrication of Amphiphilic Surfaces on Microfluidic Devices. Langmuir 2009, 25,10390-10396. 

The grafting of PEG polymers onto hydrophobic, non-polar surfaces can be readily achieved by means of hydrophobic anchoring groups in an aqueous environment an outstanding example is the aqueous lubrication of the self-mated sliding of poly(dimethylsiloxane) (PDMS) by means of an amphiphilic tri-block copolymer, poly(ethylene oxide)- /ocA -poly(propylene oxide)-block-poly(ethylene oxide) (PEO-fe-PPO-b-PEO, also known as Pluronic ), as recently reported by the authors. 

The amphiphilic block copolymers most conunonly used for the development of nanoreactors consist of hydrophiUc blocks, such as poly(aaylic acid) (PAA), poly(ethylene oxide) (PEO), poly(2-methyl oxazoline) (PMOXA), or poly[L-isocyanoalanine(2-thiophen-3-yl-ethyl)amide] (PIAT), and a hydrophobic block such as polystyrene (PS), polybutadiene (PB), or poly(dimethylsiloxane) (PDMS) [32-35]. Bionanoreactors have been obtained mainly by using polymer vesicles (polymersomes), but there are also a few reports based on other supramolecular assemblies (Table 11.1). 

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