https://ir.nctu.edu.tw:443/bitstream/11536/14909/1/000297489400002.pdf

POSS related polymer nanocomposites

Polyhedral oligosilsesquioxane (POSS)-based hybrid polymers have generated much interest recently, both from the academic and industrial points of view. POSS are completely defined molecules of nanoscale dimensions that may be functionalized with reactive groups suitable for the synthesis of new organic–inorganic hybrids, thus providing the opportunity to design and build materials with extremely well-defined dimensions possessing nanophase behavior. POSS have been successfully incorporated into common polymers via copolymerization, grafting or blending. A variety of POSS-containing copolymers have been prepared and they have displayed great potential in the development of a wide range of hybrid nanomaterials with diverse properties. This work has critically evaluated the recent developments in syntheses of POSS polymer materials leading to POSS nanocomposites. The syntheses of POSS cages, monomers containing POSS cages, POSS-dendrimers' cores, POSS-containing polymers (nanobuilding blocks) and POSS nanocomposites are described in detail. This work also assesses the properties of POSS nanobuilding blocks that can be otherwise used for developing nanocomposites. Such properties include mechanical, thermal, flame-retardant and viscoelastic properties. Investigations into the structure, morphology and compatibility of POSS nanobuilding blocks have been reviewed. Other properties covered include the ion-mobility and swelling characteristics as well as porosity of POSS nanobuilding blocks. Lastly, existing and possible future applications are highlighted and final conclusions are drawn.

Polyhedral Oligomeric Silsesquioxanes (POSS)-Containing Nanohybrid Polymers

Modification of epoxy resins with functional silanes, polysiloxanes, silsesquioxanes, silica and silicates

Polypropylene–polyhedral oligomeric silsesquioxanes (POSS) nanocomposites

http://www.ysxbcn.com/down/upfile/soft/200858/20085817452472.pdf

Evaluation of reliability of Coats-Redfern method for kinetic analysis of non-isothermal TGA

Thermodegradation kinetics of a hybrid inorganic–organic epoxy system

A new material belongs to the family of polyhedral oligomeric silsesquioxanes, the 1-(3-glycidyl) propoxy-3,5,7,9,11,13,15-isobutylpentacyclo-[9.5.1.1(3,9).1(5,15).1(7,13)]octasiloxane (glycidylisobutyl-POSS) is characterized by differential scanning calorimetry, thermogravimetric analysis and atomic force microscopy. Epoxy systems based on diglycidyl ether of bisphenol A (DGEBA) cured with the diamines, 4,4'-diamine-diphenylmethane (DDM) and 1,4-phenylenediamine (pPDA), were kinetically studied by differential scanning calorimetry in isothermal and dynamic modes. The thermal behaviour of these systems as the glycidylisobutyl-POSS was added, is discussed later.

Thermal behaviour of a polyhedral oligomeric silsesquioxane with epoxy resin cured by diamines

Kinetic and cured reaction experiments for five systems based on the epoxy resin diglycidyl ether of bisphenol A (DGEBA) cured with the diamines 1,3-bisaminomethylcyclohexane, 4-4′-diaminediphenylmetane, 1,4-phenylediamine, 4-4′(1,3-phenylenediisopropylidene) bisaniline, and 4-4′metilenebis(2,6-dietilaniline) were carried out by differential scanning calorimetry. Kinetic analysis was performed using dynamic experiments through the Kissinger and Flynn–Wall–Ozawa methods. The isothermal experimental data showed an autocatalytic behavior compared with the model proposed by Kamal. Activation energy and kinetic parameters were determined by fitting experimental data. This model provided a good description of the cure kinetics up to onset of vitrification. Diffusion control was incorporated to describe the postvitrification region. By combining the autocatalytic model and the diffusion factor, it was possible to predict the cure kinetics over the whole conversion range. The behavior of the cure kinetics of the DGEBA was similar with all the diamines used. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1759–1768, 2007

R. Montes

Papers

Thermodegradation kinetics of a hybrid inorganic–organic epoxy system

Thermal behaviour of a polyhedral oligomeric silsesquioxane with epoxy resin cured by diamines

Study of an epoxy system cured with different diamines by differential scanning calorimetry