Pattern Formation in Dewetting Poly(tert-butyl acrylate)/Polyhedral Oligomeric Silsesquioxane (POSS) Bilayer Films

Langmuir ◽  
2006 ◽  
Vol 22 (16) ◽  
pp. 6734-6738 ◽  
Author(s):  
Rituparna Paul ◽  
Alan R. Esker
Keyword(s):  
Pattern Formation ◽  
Butyl Acrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Tert Butyl ◽  
Bilayer Films ◽  
Oligomeric Silsesquioxane

Phase Separation in Poly(tert-butyl acrylate)/Polyhedral Oligomeric Silsesquioxane (POSS) Thin Film Blends

Langmuir ◽  
2008 ◽  
Vol 24 (9) ◽  
pp. 5079-5090 ◽  
Author(s):  
Rituparna Paul ◽  
Ufuk Karabiyik ◽  
Michael C. Swift ◽  
Alan R. Esker
Keyword(s):  
Thin Film ◽  
Phase Separation ◽  
Butyl Acrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Tert Butyl ◽  
Oligomeric Silsesquioxane

Crosslink Effects of Octavinyl Polyhedral Oligomeric Silsesquioxane on the Mechanical and Thermal Properties of Polyacrylate Nanocomposites

2012 ◽  
Vol 476-478 ◽  
pp. 402-405
Author(s):  
Chang Su ◽  
Cun Bin Zhao ◽  
Pan He ◽  
Cheng Zhang
Keyword(s):  
Fourier Transform ◽  
Thermal Properties ◽  
Infrared Spectrum ◽  
Butyl Acrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Crosslinking Density ◽  
Mechanical Analysis ◽  
Mechanical And Thermal Properties ◽  
Dynamic Mechanical ◽  
Oligomeric Silsesquioxane

Poly(butyl acrylate-co-methyl methacrylate-co-octavinyl polyhedral oligomeric silsesquioxane) (OVPOSS-P(BA-MMA)) nanocomposites were synthesized by emulsion polymerization. The structures of nanocomposites were characterized by Fourier transform infrared spectrum (FTIR) and solubility experiment. It was shown that the network structures have been formed during the copolymerization. Dynamic mechanical analysis (DMA) was used to investigate the dynamic mechanical and thermal properties. The data indicate that the crosslinking density apparently affects the mechanical and thermal properties of OVPOSS-P(BA-MMA).

Model Polyhedral Oligomeric Silsesquioxane Thin Films for Coating Applications

2002 ◽  
Author(s):  
Brent Viers ◽  
Shawn Phillips ◽  
Timothy Haddad ◽  
Alan Esker ◽  
Joe Polidan
Keyword(s):  
Thin Films ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

Polyhedral Oligomeric Silsesquioxane /Platelets Rich Plasma/Gelrite-Based Hydrogel Scaffold for Bone Tissue Engineering

2020 ◽  
Vol 26 (26) ◽  
pp. 3147-3160
Author(s):  
Saeedeh Ahmadipour ◽  
Jaleh Varshosaz ◽  
Batool Hashemibeni ◽  
Leila Safaeian ◽  
Maziar Manshaei
Keyword(s):  
Bone Fractures ◽  
Compressive Strain ◽  
Gelation Time ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Local Drug Delivery ◽  
Gelling Agent ◽  
Control Group ◽  
Hydrogel Scaffold ◽  
Alizarin Red ◽  
Oligomeric Silsesquioxane

Background: Polyhedral oligomeric silsesquioxane (POSS) is a monomer with silicon structure and an internal nanometric cage. Objective: The purpose of this study was to provide an injectable hydrogel that could be easily located in open or closed bone fractures and injuries, and also to reduce the possible risks of infections caused by bone graft either as an allograft or an autograft. Methods: Various formulations of temperature sensitive hydrogels containing hydroxyapatite, Gelrite, POSS and platelets rich plasma (PRP), such as the co-gelling agent and cell growth enhancer, were prepared. The hydrogels were characterized for their injectability, gelation time, phase transition temperature and viscosity. Other physical properties of the optimized formulation including compressive stress, compressive strain and Young’s modulus as mechanical properties, as well as storage and loss modulus, swelling ratio, biodegradation behavior and cell toxicity as rheometrical parameters were studied on human osteoblast MG-63 cells. Alizarin red tests were conducted to study the qualitative and quantitative osteogenic capability of the designed scaffold, and the cell adhesion to the scaffold was visualized by scanning electron microscopy. Results: The results demonstrated that the hydrogel scaffold mechanical force and injectability were 3.34±0.44 Mpa and 12.57 N, respectively. Moreover, the scaffold showed higher calcium granules production in alizarin red staining compared to the control group. The proliferation of the cells in G4.5H1P0.03PRP10 formulation was significantly higher than in other formulations (p<0.05). Conclusion: The optimized Gelrite/Hydroxyapatite/POSS/PRP hydrogel scaffold has useful impacts on osteoblasts activity, and may be beneficial for local drug delivery in complications including a break or bone loss.

Hydrogen Bonding-Derived Healable Polyacrylate Elastomers via On-demand Copolymerization of n-Butyl Acrylate and tert-Butyl Acrylate

2020 ◽  
Vol 12 (45) ◽  
pp. 50812-50822
Author(s):  
Wenyan Wang ◽  
Zongxu Liu ◽  
Zijian Guo ◽  
Junliang Zhang ◽  
Chunmei Li ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Butyl Acrylate ◽  
Tert Butyl ◽  
On Demand

scholarly journals Polyhedral oligomeric silsesquioxane (POSS)-modified phenolic resin: Synthesis and anti-oxidation properties

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 316-326
Author(s):  
Bing Wang ◽  
Minxian Shi ◽  
Jie Ding ◽  
Zhixiong Huang
Keyword(s):  
Phenolic Resin ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Synthesis Process ◽  
H Nmr ◽  
Chemical Structures ◽  
Carbon Fiber Fabric ◽  
Oxidation Properties ◽  
Tg And Dtg ◽  
Oligomeric Silsesquioxane ◽  
Fiber Fabric

Abstract In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N2, which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.

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