Tractable silicon-containing poly(diphenylacetylenes): their synthesis and high gas permeability

Tsuchihara, Kenji; Masuda, Toshio; Higashimura, Toshinobu

doi:10.1021/ja00022a066

Cited by 143 publications

(83 citation statements)

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“…44,45 The PDPAs used in this study had high average molecular weights (M w ) of 1.34×10 6 and 8.7 × 10 6 g mol − 1 and polydispersity indices (PDI = M w /M n ) of 1.2 and 1.4, respectively. The poly[2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenyl enevinylene] was purchased from Sigma-Aldrich Co. Ltd. (St Louis, MO, USA).…”

Section: Materials and Methods Materialsmentioning

confidence: 99%

Phase-change hybrids for thermo-responsive sensors and actuators

et al. 2014

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Highly advanced phase-change hybrids (PCHs), which consist of a phase-change material and conjugated polymer, were developed for new sensor and actuator applications. PCH films with excellent characteristics were obtained simply by depositing various molten paraffin waxes (PWs) in situ onto poly(diphenylacetylene) (PDPA) films with extremely large fractional free volumes. The phase-change enthalpy of the PWs in the hybrid films was quite high and remained constant over prolonged use. The PCH films underwent critical changes in both fluorescence (FL) intensity and color during the phase change of the PWs, which facilitated various sensor applications such as highly reversible writing/erasing, fingerprinting and array-type thermometer usage. In addition, a biaxially oriented polypropylene (BOPP)-supported PCH film exhibited extremely fast and highly reproducible thermomechanical actuation with reversible curling/uncurling during the phase change of the PWs. These findings will be useful for developing novel PCH materials with highly advanced functions and applications.

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Section: Materials and Methods Materialsmentioning

confidence: 99%

Phase-change hybrids for thermo-responsive sensors and actuators

et al. 2014

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“…In this connection, it has recently been revealed that poly(DPA)s containing trimethylsilyl group on one phenyl group are totally soluble in common organic solvents. 18 A tough, free-standing film is accessible from poly(p-C9F 17 ODPA) by casting its m-(CF 3 ) 2 -C6H4 solution. Poly(p-C9F 1 7 OPH) is too brittle to hold its filmy state, which is probably due to its molecular weight being not high enough.…”

Section: Polymer Propertiesmentioning

confidence: 99%

Polymerization of Acetylenes Containing Heptadecafluorononenyloxy Group and Polymer Properties

Yoshimura

Asano

1994

Polym J

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ABSTRACT:Polymerizations of two kinds of fluorine-containing aromatic disubstituted acetylenes, l-[p-(heptadecafluorononenyloxy)phenyl]-2-pheny lacetylene (p-C 9 F 17 ODPA) and 1-[p-(heptadecafluorononenyloxy)phenyl]-1-hexyn e (p-C9 F 1 7 OPH) were studied with groups 5 and 6 transition-metal catalysts. p-C9 F 17 ODPA polymerized with TaC1 5 -Et 3 SiH catalyst to give a new polymer over 70 yield and its maximum intrinsic viscosity ([r,]) was as high as 2.ldlg-1 • p-C9 F 170PH polymerized with Ta and Nb catalysts, but yield and [11] of the polymer were lower. Poly(p-C9 F, 7 ODPA) and poly(p-C9 F 17OPH) were in the form ofa yellow solid and white solid, and began to lose weight at 410°C and 270°C, respectively, which indicates high thermal stability. Both polymers had a main-chain structure consisted of alternating double bonds, and were completely soluble in some fluorine-containing solvents such as m-(CF 3 )iC 6 H 4 and CCl 2 FCC1F 2 . Poly(p-C9 F 17ODPA) formed a tough film by solution casting, and showed high P 02 value [4x 10-8 cm 3 (STP)cmcm-2 s-1 cmHg-1 ] comparable to that ofpoly(dimethylsiloxane).

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“…27 And also silicon-containing mono-and disubstituted polyacetylenes were prepared by the transition metal catalyzed polymerization of the corresponding acetylene derivatives. [28][29][30] However, there have been no reports on the synthesis of conjugated polymers with silacycloalkane moieties. Now we report the synthesis of a spiro-type conjugated cyclopolymer by the polymerization of 1,1-dipropargyl-1-silacyclohexane by various transition metal catalysts and the characterization of the resulting polymer.…”

Section: Introductionmentioning

confidence: 99%

Cyclopolymerization of 1,1-Dipropargyl-1-silacyclohexane by Transition Metal Catalysts

2007

Bulletin of the Korean Chemical Society

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A conjugated spirocyclic polymer was synthesized via the cyclopolymerization of 1,1-dipropargyl-1-silacyclohexane with various transition metal catalysts. The monomer, 1,1-dipropargyl-1-silacyclohexane was synthesized by Grignard reaction of 1,1-dichloro-1-silacyclohexane with propargyl magnesium bromide. This polymerization proceeded well to give the corresponding poly(1,1-dipropargyl-1-silacyclohexane). The catalytic activity of WCl 6 was found to be similar with that of MoCl 5 . The structure of polymer having the conjugated backbone with silacyclohexane moieties was characterized by such instrumental methods as NMR ( 1 H-, 13 C-), IR, and UV-visible spectroscopies. The resulting polymers were mostly yellow or light-brown powders, depending on the catalyst systems used. This polymer was completely soluble in halogenated and aromatic hydrocarbons such as chloroform, 1,2-dichloromethane, benzene, toluene, and chlorobenzene, etc. The thermal and oxidative stabilities of polymer were also studied and discussed.

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Tractable silicon-containing poly(diphenylacetylenes): their synthesis and high gas permeability

Cited by 143 publications

References 0 publications

Phase-change hybrids for thermo-responsive sensors and actuators

Phase-change hybrids for thermo-responsive sensors and actuators

Polymerization of Acetylenes Containing Heptadecafluorononenyloxy Group and Polymer Properties

Cyclopolymerization of 1,1-Dipropargyl-1-silacyclohexane by Transition Metal Catalysts

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