Hemi-Telechelic Polystyrene-POSS Copolymers as Model Systems for the Study of Well-Defined Inorganic/Organic Hybrid Materials

Cardoen, Gregoire; Coughlin, E. Bryan

doi:10.1021/ma049769c

Cited by 97 publications

(70 citation statements)

References 44 publications

(89 reference statements)

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“…They have gained attention as a polymeric additive principally because they can be modified to achieve good interfacial adhesion with the polymer matrix (Phillips, Haddad, & Tomczak, 2004;Zhao, Fu, & Liu, 2008) and, once well dispersed, have the ability to improve a variety of polymer properties, including increased oxidative resistance, increased toughness, increased thermal stability, and reduced flammability (Li et al, 2001;Schwab & Lichtenhan, 1998;Zheng, Farris, & Coughlin, 2001). The exterior organic layer allows POSS to be incorporated in hydrophobic polymers, such as polypropylene (Fina, Tabuani, Frache, & Camino, 2005;Zheng et al, 2001;Zhou, Cui, Zhang, Zhang, & Yin, 2008) and polystyrene (Cardoen & Coughlin, 2004;Liu et al, 2007;Wu, Haddad, Kim, & Mather, 2007). Due to the availability of POSS molecules with a variety of both reactive and non-reactive substituent functionalities, polymer composites have been synthesized using copolymerization, grafting, or simply blending techniques (Li et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Char-forming behavior of nanofibrillated cellulose treated with glycidyl phenyl POSS

Fox

Lee

Zammarano

et al. 2012

Carbohydrate Polymers

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Fox, Douglas M.; Lee, Jieun; Zammarano, Mauro; Katsoulis, Dimitris; Eldred, Donald V.; Haverhals, Luke M.; Trulove, Paul C.; DeLong, Hugh C.; and Gilman, Jeffery W., "Char-forming behavior of nanofibrillated cellulose treated with glycidyl phenyl POSS" (2012 a b s t r a c tCellulose-reinforced composites have received much attention due to their structural reinforcing, light weight, biodegradable, non-toxic, low cost and recyclable characteristics. However, the tendency for cellulose to aggregate and its poor dispersion in many polymers, such as polystyrene, continues to be one of the most challenging roadblocks to large scale production and use of cellulose-polymer composites. In this study, nanofibrillated cellulose (NFC) is modified using GlycidylPhenyl-POSS (a polyhedral oligomeric silsesquioxane). The product yield, morphology, and crystallinity are characterized using a variety of spectroscopy and microscopy techniques. Thermal analyses are performed using thermal gravimetric analysis and pyrolysis combustion flow calorimetry.

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Section: Introductionmentioning

confidence: 99%

Char-forming behavior of nanofibrillated cellulose treated with glycidyl phenyl POSS

Fox

Lee

Zammarano

et al. 2012

Carbohydrate Polymers

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“…Consequently, various combinations of polymeric components and PSQs have been investigated. [8][9][10][11][12] We have previously investigated the grafting of the biodegradable polymers e-caprolactone (CL) and L-(-)-lactide (LA) from the PSQ main chain containing phenyl and aminopropyl groups (APSQ). 13,14 In thermal analyses of the resultant PSQs, low crystallinity of the polymeric components seems to be induced by the presence of the polysiloxane structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of grafted polysilsesquioxane by ring-opening polymerization of lactide and trimethylene carbonate

Kashio

Sugizaki

Tanaka

et al. 2011

Polym J

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The polysilsesquioxane (PSQ) containing 3-aminopropyl and phenyl groups (APSQ) was prepared from the corresponding trimethoxysilanes by co-condensation under basic conditions. The amino groups on APSQ were used as the initiator species for the graft polymerization of 1,3-trimethylene carbonate (TMC) and L-(-)-lactide (LA). The ring-opening polymerization of TMC and LA in the presence of the catalytic 1-trimethylsilylimidazole proceeded effectively to afford the PSQ with poly(TMC) and/or poly(LA) as the graft chains. The grafted PSQ containing poly(LA) showed the heat durability as an advantage of the hybrid polymer. In differential scanning calorimetry analysis, the grafted random copolymer of TMC and LA showed no clear endotherm corresponding to melting point (T m ). For the poly(LA)-grafted PSQ, the peak indicating T m was observed in the first heating run, but the corresponding peak was very small in the second run.

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“…Graft polymerizations onto and from the PSQ main chain are one of the most effective methods of making modifications, in which the polymeric component provides an additional property besides durability for heat and weatherability based on the inorganic polysiloxane backbone. [12][13][14][15][16] Among the various functions conferred on the hybrids on the basis of their polysiloxane structure, thermoresponsive phase separation in an aqueous solution is one of the useful properties. This property is required of materials used for microencapsulation, biosensors, drug delivery and so forth, as reported in a variety of recent works.…”

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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Hemi-Telechelic Polystyrene-POSS Copolymers as Model Systems for the Study of Well-Defined Inorganic/Organic Hybrid Materials

Cited by 97 publications

References 44 publications

Char-forming behavior of nanofibrillated cellulose treated with glycidyl phenyl POSS

Char-forming behavior of nanofibrillated cellulose treated with glycidyl phenyl POSS

Synthesis of grafted polysilsesquioxane by ring-opening polymerization of lactide and trimethylene carbonate

Synthesis of thermoresponsive polysilsesquioxane with methoxyethylamide group and crown ether

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