نتایج جستجو برای: poss

تعداد نتایج: 945  

Journal: :E-polymers 2021

Abstract In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified (POSS-PR). Chemical structures POSS-8SH, POSS-8Phenol, POSS-PR confirmed by FTIR 1 H-NMR. TG DTG analysis under different atmosphere showe...

2014
Weiguo Wang Xiang Sun Li Huang Yu Gao Jinghao Ban Lijuan Shen Jihua Chen

Organic-inorganic hybrid materials, such as polyhedral oligomeric silsesquioxanes (POSS), have the potential to improve the mechanical properties of the methacrylate-based composites and resins used in dentistry. In this article, nanocomposites of methacryl isobutyl POSS (MI-POSS [bears only one methacrylate functional group]) and methacryl POSS (MA-POSS [bears eight methacrylate functional gro...

2009
R. Verker E. Grossman N. Eliaz

Polyhedral Oligomeric Silsesquioxane (POSS)–polyimide (PI) thin films were synthesized from pre-mixed solution of oxydianiline–pyromellitic dianhydryde (ODA–PMDA) and TriSilanolPhenyl (TSP) POSS. POSS– PI polymerization reaction kinetics was studied using Fourier Transform Infrared (FTIR) spectroscopy. The POSS–PI films were then investigated by tensile tests, followed by surface morphology exa...

Journal: :Journal of colloid and interface science 2011
Chu-Hua Lu Chia-Hua Tsai Feng-Chih Chang Kwang-Un Jeong Shiao-Wei Kuo

Two flexible ether bonds were designed to connect two pyrene rings on a polyhedral oligomeric silsesquioxane (BPy-POSS) to enrich the fraction of "intrinsic intramolecular pyrene-dimer" on the surface of crystal isobutyl-POSS (iBu-POSS) thin-films. Compared to the monomer emission of 1-pyrenemethanol (Py-OH), the emission spectra of BPy-POSS in dichloromethane show the large proportion of intra...

Journal: :Applied sciences 2023

To improve the thermal and mechanical properties of epoxy resins, epoxy-functionalized POSS (E-POSS) glass fiber (GF) were used to reinforce resin (E51) composites. The tensile, thermo-mechanical, fractured, tests carried out characterize these hybrid materials. results show that E-POSS GF could significantly resins due high crosslink density matrix synergistic interaction between resin, E-POSS...

Journal: :The journal of physical chemistry. B 2005
Alberto Striolo Clare McCabe Peter T Cummings

Polyhedral oligomeric silsesquioxane (POSS) molecules when functionalized appropriately and dispersed in polymers show promise as monodisperse organic-inorganic hybrid nanocomposite materials characterized by superior mechanical properties. We report here molecular-simulation results for POSS-POSS radial distribution functions, potentials of mean force, and self-diffusion coefficients for POSS ...

Journal: :Soft matter 2016
Yi-Syuan Lu Chia-Yu Yu Yung-Chih Lin Shiao-Wei Kuo

In this study, the influence of the functional groups by the diblock copolymers of poly(styrene-b-4-vinylpyridine) (PS-b-P4VP), poly(styrene-b-2-vinylpyridine) (PS-b-P2VP), and poly(styrene-b-methyl methacrylate) (PS-b-PMMA) on their blends with octa-functionalized phenol polyhedral oligomeric silsesquioxane (OP-POSS) nanoparticles (NPs) was investigated. The relative hydrogen bonding strengths...

2013
Yuanming DENG Safia Boudjema Jean Yves BUFFIERE

This work is generally aimed to synthesize POSS based BCPs via RAFT polymerization, to study their self-assembly behaviors, to research on the effect of POSS self-assembly structure on the bulk properties and to prepare nanostructured hybrid epoxy via self-assembly of POSS based copolymer. In Chapter1, We studied the RAFT polymerization of POSS macromers and capable to synthesize well defined P...

2005
Jian Wu Timothy S. Haddad Patrick T. Mather

The thermal properties and rheological behaviors of polystyrene (PS)-based thermoplastics bearing polyhedral oligosilsesquioxane (POSS) were investigated with variation of isobutyl (iBu)-POSS weight percentage. The incorporation of POSS-group significantly decreases the glass transition temperature and the rubbery plateau modulus. These findings are attributed to an influence of the nanometer-s...

2000
B. X. Fu S. Pagola P. Stephens H. White M. Rafailovich J. Sokolov H. G. Jeon S. Phillips J. Lichtenhan J. Schwab

A unique polyurethane (PU) elastomer containing inorganic polyhedral oligomeric silsesquioxane (POSS) molecules as molecular reinforcements in the hard segment was investigated by means of wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) techniques. The mechanical properties of POSS modified polyurethane (POSS-PU) were also comp...

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