Synthesis and characterization of hyperbranched polymer consisting of silsesquioxane derivatives

Miyasaka, Makoto; Fujiwara, Yusuke; Kudo, Hiroto; Nishikubo, Tadatomi

doi:10.1038/pj.2010.79

Cited by 36 publications

(42 citation statements)

References 11 publications

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“…Although the incompletely condensed POSS derivatives have generally been used as precursors for mono-functionalized POSSs, 51,52 they can also serve as three-dimensional scaffolds of tripodal molecules such as initiators, 53 ligands for transition metals 54 and cross-linking agents. 42,55 Hence, precisely defined POSS emulsifiers with multiple hydrophobic and hydrophilic substituents would exploit the threedimensional structure of POSS to its fullest extent. Additionally, it is expected that incompletely condensed POSSs can effectively restrict crystallinity by lowering the rigidity to gain solubility, without losing thermal stability, in comparison with completely condensed POSSs, which could result in aggregation (aggregation formation due to the high crystallinity has been utilized for construction of micro-structures; e.g., see Hayakawa et al 28 , Hirai et al 29 , , Hirai et al 30 , Ishida et al 31 ).…”

Section: Introductionmentioning

confidence: 99%

“…From this point of view, polyhedral oligomeric silsesquioxanes (POSSs) [17][18][19][20][21] are one of the most suitable candidates because of their precisely defined three-dimensional structure. POSSs have been widely used as fillers, [22][23][24][25][26][27] cross-linkers, 28-33 monomers [34][35][36][37] and substituents to polymer side chains, [38][39][40][41][42][43] to attain high performance. To obtain a POSS emulsifier, the basic strategy is the construction of amphiphilic POSS derivatives.…”

Section: Introductionmentioning

confidence: 99%

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Tripodal polyhedral oligomeric silsesquioxanes as a novel class of three-dimensional emulsifiers

Imoto

Nakao

Nishizawa

et al. 2015

Polym J

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Tripodal amphiphilic molecules toward organic-inorganic hybrid emulsions were successfully synthesized based on incompletely condensed polyhedral oligomeric silsesquioxanes (POSSs). The three silanol groups provide an excellent scaffold for the construction of three-dimensional amphiphilic molecules, thus well-defined tripodal amphiphilic POSS derivatives were readily synthesized. Thermal analyses revealed that an incompletely condensed POSS exhibited lower crystallinity without loss of thermal stability in comparison with a completely condensed POSS, whereas readily forms aggregates because of its high crystallinity. The newly synthesized tripodal amphiphilic POSSs possessed good solubility in water and effectively stabilized oil-in-water emulsions, while a conventional mono-substituted amphiphilic POSS did not work as an emulsifier because of its lack of water solubility. The prepared organic-inorganic hybrid emulsions were stable against coalescence, and no demulsification occurred over 1 month.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tripodal polyhedral oligomeric silsesquioxanes as a novel class of three-dimensional emulsifiers

Imoto

Nakao

Nishizawa

et al. 2015

Polym J

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“…Di-functional POSS derivatives have attracted considerable attention in recent years. Depending on the types of reactive substituents, they have been successfully incorporated into such macromolecules as polyimide [9][10][11], polysiloxane [12], polyamide [13], polyurethane [14], polysulfone [15], vinylidene-arylene copolymer [16], and polyethylene [17], via the polyethylene [17], via the step-growth polymerization process [9][10][11][13][14][15][16]18], or as pendant groups and cross-linkage sites through the coordination copolymerization [17].…”

Section: Introductionmentioning

confidence: 99%

Multi-Alkenylsilsesquioxanes as Comonomers and Active Species Modifiers of Metallocene Catalyst in Copolymerization with Ethylene

et al. 2018

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Abstract:The copolymers of ethylene (E) with open-caged iso-butyl-substituted tri-alkenyl-silsesquioxanes (POSS-6-3 and POSS-10-3) and phenyl-substituted tetra-alkenyl-silsesquioxane (POSS-10-4) were synthesized by copolymerization over the ansa-metallocene catalyst. The influence of the kind of silsesquioxane and of the copolymerization conditions on the reaction performance and on the properties of the copolymers was studied. In the case of copolymerization of E/POSS-6-3, the positive comonomer effect was observed, which was associated with the influence of POSS-6-3 on transformation of the bimetallic ion pair to the active catalytic species. Functionality of silsesquioxanes and polymerization parameters affected the polyhedral oligomeric silsesquioxanes (POSS) contents in the copolymers which varied in the range of 1.33-7.43 wt %. Tri-alkenyl-silsesquioxanes were incorporated into the polymer chain as pendant groups while the tetra-alkenyl-silsesquioxane derivative could act as a cross-linking agent which was proved by the changes in the contents of unsaturated end groups, by the glass transition temperature values, and by the gel contents (up to 81.3% for E/POSS-10-4). Incorporation of multi-alkenyl-POSS into the polymer chain affected also the melting and crystallization behaviors.

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“…Si-H, Si-HC=CH 2 are of special interest as there are reports on efficient catalytic reactions used for synthesis of copolymeric DDSQ based systems (e.g. hydrosilylation, cross-metathesis or silylative coupling) [9][10][11][12][13]. The macromolecular DDSQ-based systems are of specific importance as the silsesquioxane is embedded in the linear chain of the copolymer.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Dialkenyl-Substituted Double-Decker Silsesquioxanes as Precursors for Linear Copolymeric Systems

Mituła

Dudziec

Marciniec

2017

J Inorg Organomet Polym

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In this paper, we report an efficient synthetic route for dialkenyl-substituted double-decker silsesquioxane derivatives as difunctional reagents for further applications. This study concerns synthesis of allyl, hex-5-enyl-and dec-9-enyl-doubledecker silsesquioxanes obtained via condensation and hydrosilylation process as alternative processes, with high yields. The presence of unsaturated groups allows these compounds to be used as molecular synthons for hybrid silsesquioxane based systems of macromolecular nature. Graphical AbstractKeywords Silsesquioxane · DDSQ · Double-decker silsesquioxane · Dialkenylfunctional silsesquioxanes

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Synthesis and characterization of hyperbranched polymer consisting of silsesquioxane derivatives

Cited by 36 publications

References 11 publications

Tripodal polyhedral oligomeric silsesquioxanes as a novel class of three-dimensional emulsifiers

Tripodal polyhedral oligomeric silsesquioxanes as a novel class of three-dimensional emulsifiers

Multi-Alkenylsilsesquioxanes as Comonomers and Active Species Modifiers of Metallocene Catalyst in Copolymerization with Ethylene

Synthesis of Dialkenyl-Substituted Double-Decker Silsesquioxanes as Precursors for Linear Copolymeric Systems

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