Syntheses of siloxane-grafted aromatic polymers and the application to pervaporation membrane

Yu, Na; Ando, Tomonori; Yun, Cheol Min

doi:10.1016/j.reactfunctpolym.2007.07.057

Cited by 44 publications

(18 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The side chain with both flexible Si-O linkages and bulk SiMe 3 groups, which are moving in the material, may control the diffusibility of the permeating gas. Similar gas permeation behaviors have been reported previously for oligosiloxane-substituted polymers such as polystyrene, 19,20 polyimide, 21,22 and polyacetylene.…”

Section: Gas Permeation Properties Of Poly(norbornene) With Siloxane supporting

confidence: 87%

Synthesis and Properties of Addition-Type Poly(norbornene)s with Siloxane Substituents

2009

View full text Add to dashboard Cite

Vinyl addition copolymerization of norbornene with norbornene derivatives bearing siloxane substituent, three arm-, cyclicand phenyl-siloxane groups, was realized in the presence of the binary Ni(acac) 2 /B(C 6 F 5 ) 3 system. The resulting copolymers show good solubility in common organic solvents and possess a very high grass transition temperature between 265 and 360 C, depending on the content and structure of the siloxane groups. The incorporation of siloxane groups linked to the polymer chain results in a significant increase in the mechanical flexibility of the corresponding films. Furthermore, the gas permeability is also dependent on the content and structure of the siloxane groups, and the films obtained for the polymers with three arm-siloxane group (-Si(OSiMe 3 ) 3 ) display high oxygen permeability in the range of 39 to 239 Barrer.KEY WORDS: Polynorbornene / Siloxane Substituent / Copolymerization / Nickel Catalyst / Norbornene can be polymerized by three different methods: ring opening metathesis polymerization (ROMP), cationic or radical polymerization, and vinyl addition polymerization. 1Among these polymers, addition-type poly(norbornene), presenting the rigid bicyclic structure, is recently attracting strong interest in optical and opto-electronic device applications because of high optical transparency, low birefringence, very high glass transition temperature and low dielectric constant. However, poor solubility in common organic solvents and mechanical brittleness are serious disadvantages for the processing of the polymer materials. These problems can be improved markedly by copolymerizing a small amount of functional norbornene derivatives.So far, many types of poly(norbornene)s with functional groups have been prepared. [2][3][4][5][6][7][8][9][10][11][12][13] Heitz et al. 2,3 investigated the addition-type copolymerizations of norbornene with norbornene carboxylic acid esters, and found that the solubility of the copolymers and the thermal properties, such as glasstransition and decomposition temperatures, were dependent on the content as well as structure of the substituents. Risse et al. [4][5][6] came to the same conclusion by studying poly-(norbornene)s containing hydroxyl, carboxylic acid and ester. Goodall et al.7-9 and Grove et al. 10 prepared alkyl-or alkoxysilyl-substituted poly(norbornene)s, which showed improved mechanical toughness and adhesion to common substrate materials. On the other hand, Dorkenoo et al. 11and Finkelshtein et al.12 investigated the homopolymers of norbornene derivatives bearing alkyl or alkylsilyl substituents, and demonstrated that the chain length and the bulkiness of the substituents played a decisive role in the transport properties, such as gas permeability and permselectivity, for the polymeric membranes. These results show that the nature of substituent and the content in the main chain are an important factor for the regulation of the material properties.Poly(siloxane) is a class of polymers that has practical importance in the consumer and indus...

show abstract

Section: Gas Permeation Properties Of Poly(norbornene) With Siloxane supporting

confidence: 87%

Synthesis and Properties of Addition-Type Poly(norbornene)s with Siloxane Substituents

2009

View full text Add to dashboard Cite

show abstract

“…The synthetic procedures of diamino-terminated PDMS macromonomer, BAPB-PDMS, PDMS grafted aromatic poly(amide-imide) (PAI-g-PDMS) and 3,5-bis(4-nitrophenyloxy)benzoic acid (BNPB) were described in our previous papers [6,7]. 1-Methoxy poly(ethylene glycol) (Mw = 350) was purchased from Aldrich Chemical Co. Ltd, and it was dehydrated by heating over 130°C in vacuo for 10 h before use.…”

Section: Methodsmentioning

confidence: 99%

“…Actually, we have reported the PDMS-grafted poly(amide-imide) exhibiting the high solubility for several organic-solvents as compared with PDMS-grafted polyamide [6], which would be due to the asymmetrical structure in the backbone component.…”

Section: Introductionmentioning

confidence: 99%

Preparations and Characterizations of PDMS/PEO-Grafted Polyamide and Poly(amide-imide)

Ishikura

Yun

Abeta³

et al. 2010

Trans. Mat. Res. Soc. Japan

View full text Add to dashboard Cite

Polydimethylsiloxane and poly(ethylene oxide) randomly grafted polyamide (PA-g-SE) and poly(amide-imide) (PAI-g-SE) were prepared by a macromonomer method, and the effect of the backbone structure on the thermal property and the solubility of the graft copolymers was investigated. Glass transition temperature (Tg) of PAI-g-SE was observed in the range of 160 -170°C, whereas Tg of PA-g-SE was not observed in the range of 0 -300°C. The obtained PAI-g-SE was soluble in some solvents such as DMSO, DMF, THF and chloroform, whereas PA-g-SE was soluble only in NMP just after precipitation when it was swollen in methanol. In addition, the solubility of PAI-g-SE was depended on the components, where the affinity of polymer against THF and chloroform increased with the increase of PDMS content in the polymer.

show abstract

“…As the current benchmark of hydrophobic membrane material, PDMS has more superior characteristic [21] due to its higher surface hydrophobicity and vapors permeability, which is often used for ethanol recovery from aqueous solution [22]. Different from hydroxyl-terminated PDMS, the cross-linker of vinyl-terminated PDMS (0.1 mmol/g vinyl content) is PMHS, which contains several hydride groups (4 mmol/g) on shorter polydimethylsiloxane chains and could reacted with vinyl-terminated PDMS by Pt-catalyzed hydrosilylation reaction to form densely polymer network.…”

Section: Performance Of Pure Pdms Membranementioning

confidence: 99%

Hydrophobic nano-silica/polydimethylsiloxane membrane for dimethylcarbonate–methanol separation via pervaporation

Wang¹,

Han²,

Li³

et al. 2011

Chemical Engineering Journal

View full text Add to dashboard Cite

Syntheses of siloxane-grafted aromatic polymers and the application to pervaporation membrane

Cited by 44 publications

References 27 publications

Synthesis and Properties of Addition-Type Poly(norbornene)s with Siloxane Substituents

Synthesis and Properties of Addition-Type Poly(norbornene)s with Siloxane Substituents

Preparations and Characterizations of PDMS/PEO-Grafted Polyamide and Poly(amide-imide)

Hydrophobic nano-silica/polydimethylsiloxane membrane for dimethylcarbonate–methanol separation via pervaporation

Contact Info

Product

Resources

About