Preparation of polysilsesquioxane having dimethylamino group and grafted thermoresponsive polymer

Yamamoto, Shinichi; Minami, Fukutaro; Masuda, Toyoshi; Moriya, Osamu; Kashio, Mikihiro; Sugizaki, Toshio

doi:10.1016/j.polymer.2006.08.061

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…[17][18][19][20][21][22][23] Owing to the interest in such applications, we have investigated the graft polymerization of N-isopropylacrylamide. [24][25][26] Through the grafting of the polymeric component, the resulting PSQ successfully exhibited a thermoresponsive property in an aqueous solution. Although the corresponding functionalized gel is known to be useful and a convenient hybrid, PSQ soluble in a usual solvent could be used in a wide range of applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of thermoresponsive polysilsesquioxane with methoxyethylamide group and crown ether

Matsuoka

Yamamoto

Moriya

et al. 2010

Polym J

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A polysilsesquioxane with a bis(2-methoxyethyl)amide group and 15-crown-5-ether ring (MCPSQ) was newly prepared by the co-condensation of silane coupling reagents, which were obtained from (3-isocyanatopropyl)triethoxysilane and the corresponding amines with the respective groups. MCPSQ showed the expected amphiphilic and thermoresponsive properties. The behaviors of hydrophobic aggregation of MCPSQ in the aqueous solutions containing the chlorides of lithium, potassium and sodium reflected the selective ion recognition property due to the presence of the crown ether. The highest aggregation temperature of 32 1C was observed in the solution containing sodium ion as expected from the coordination ability of the crown ether group. With the use of the sodium salt of 4-phenylazobenzoic acid as an additive in the aqueous solution of MCPSQ, the aggregation temperature was changed according to the photochemical isomerization of the phenylazobenzoate group. The results show the efficient coordination of the sodium salt with the crown ether ring.

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Section: Introductionmentioning

confidence: 99%

Synthesis of thermoresponsive polysilsesquioxane with methoxyethylamide group and crown ether

Matsuoka

Yamamoto

Moriya

et al. 2010

Polym J

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“…[15][16][17] The synthesis of thermoresponsive PSQs, grafted the copolymer of N,N-dimethylacrylamide (DMAA) and Nisopropylacrylamide (NIPAM), was an example utilizing the modification method. [18][19][20] The PSQ, showing the stimuliresponsive property, has potential to be used in the practical material scenes of microencapsulation, biosensor, and drug delivery as postulated in the investigations concerning poly-(NIPAM). [21][22][23][24][25][26][27] For the grafting of the acrylamide polymers from PSQ back bone, the mercapto group was usable as a chain transfer specie in photo-polymerization.…”

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confidence: 99%

Preparation of Thermoresponsive Grafted Polysilsesquioxane from Polyacrylamides Having Methoxysilyl End Group

Moriya

Yamamoto

Masuda

et al. 2008

Polym J

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(3-Mercaptopropyl)trimethoxysilane was employed as a chain transfer for the polymerization of N-isopropylacrylamide (NIPAM) and N,N-dimethylacrylamide (DMAA) under UV irradiation to obtain the corresponding polymers having methoxysilyl end group. By the condensation reaction of such macrosilane coupling reagents under basic or acidic conditions, the grafted polysilsesquioxanes, which were soluble in usual organic solvents, were formed without gelation. The cocondensation of the macrosilane coupling reagents enabled the preparation of the grafted polysilsesquioxane, in which poly(NIPAM) and poly(DMAA) were introduced respectively into the polysilsesquioxane main chain. Such macrosilane coupling reagents and the grafted polysilsesquioxanes showed an amphiphilic property. Furthermore, those containing poly(NIPAM) showed reversible thermoresponsive aggregation in an aqueous solution. In the thermoresponsive phase separation measured by turbidity, no change of aggregation temperature caused by the presence of poly(DMAA) was observed.

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Synthesis and characterization of amino functionalized ladder-like polysilsesquioxanes and their hybrid films with polyimide

Gao

Tian

et al. 2012

Chin J Polym Sci

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Preparation of polysilsesquioxane having dimethylamino group and grafted thermoresponsive polymer

Cited by 7 publications

References 35 publications

Synthesis of thermoresponsive polysilsesquioxane with methoxyethylamide group and crown ether

Synthesis of thermoresponsive polysilsesquioxane with methoxyethylamide group and crown ether

Preparation of Thermoresponsive Grafted Polysilsesquioxane from Polyacrylamides Having Methoxysilyl End Group

Synthesis and characterization of amino functionalized ladder-like polysilsesquioxanes and their hybrid films with polyimide

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