نتایج جستجو برای: polyhedral oligomeric silsesquioxane poss

تعداد نتایج: 13529  

2014
Jheng-Guang Li Cheng-Ying Tsai

In this study, we prepared a mesoporous carbon with hexagonally packed mesopores through evaporation-induced self-assembly (EISA)—with the diblock copolymer poly(ethylene oxide-b-ε-caprolactone) (PEO-b-PCL) as the template (EO114CL84), phenolic resin as the carbon precursor, hexamethylenetetramine (HMTA) as the curing agent, and star octakis-PEO-functionalized polyhedral oligomeric silsesquioxa...

2007
X Zhang

Self-assembly of functionalized nano building blocks (NBBs) is a promising avenue for ‘bottom-up’ nanomaterials design. Experimental studies on functionalized polyhedral oligomeric silsesquioxane (POSS) nanocubes have revealed a wide variety of nanostructures from their assemblies. Our previous simulation studies have reproduced some of these nanostructures and predicted unusual phase behaviour...

Journal: :The journal of physical chemistry. B 2011
Kazuhide Ueno C Austen Angell

To support a new interpretation of the origin of the dynamic heterogeneity observed pervasively in fragile liquids as they approach their glass transition temperatures T(g), we demonstrate that the introduction of ~2 nm structural inhomogeneities into a homogeneous glass former leads to a decoupling of diffusion from viscosity similar to that observed during the cooling of orthoterphenyl (OTP) ...

Journal: :High voltage 2021

This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane (OvPOSS) on tuning electrical performance polypropylene (PP). OvPOSS with different content are introduced into PP using solution method. The microstructural morphology, crystallinity behaviour, breakdown strength, DC conductivity, space charge formation, and trapping level distribution measured. results indicate tha...

2017
Yolanda Bautista Ana Gozalbo Sergio Mestre Vicente Sanz

A polyester composite was prepared through the polymerization of an unsaturated ester resin with styrene and an open-cage oligomeric silsesquioxane with methacrylate groups. The effect of the open-cage oligomeric silsesquioxane on the thermal stability of the thermostable polyester was studied using both thermogravimetric analysis and differential thermal analysis. The results showed that the m...

2015
Karin Hermana Neppelenbroek

The clinical longevity of tooth-coloured restorations, whether direct or indirect, using composites and ceramics, greatly depends on the quality and stability of their marginal adaptation. In this issue, two interesting studies 7,15 bring this subject and lead us to an exciting discussion. Poor marginal adaptation of direct and indirect restorations exposes the dentin pulp complex to the oral e...

Journal: :ACS applied materials & interfaces 2010
Adam J Meuler J David Smith Kripa K Varanasi Joseph M Mabry Gareth H McKinley Robert E Cohen

Ice formation and accretion may hinder the operation of many systems critical to national infrastructure, including airplanes, power lines, windmills, ships, and telecommunications equipment. Yet despite the pervasiveness of the icing problem, the fundamentals of ice adhesion have received relatively little attention in the scientific literature and it is not widely understood which attributes ...

2014
Siddarth Srinivasan

Non-wetting surfaces are characterized by the presence of stable pockets of vapor trapped within the asperities of the surface morphology. The utility of these surfaces in reducing skin friction in viscous laminar and turbulent flows is experimentally and theoretically investigated and is the main focus of this thesis. The development of a surface coating that reduces fluid drag can potentially...

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