scholarly journals Cure Behavior and Thermomechanical Properties of Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 334 ◽  
Author(s):  
Xiaodan Li ◽  
Baifeng Yu ◽  
Dongxing Zhang ◽  
Jing Lei ◽  
Zhu Nan
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermomechanical Properties ◽  
Cure Behavior ◽  
Oligomeric Silsesquioxane

Morphology and Thermomechanical Properties of Melt-Mixed Polyoxymethylene/Polyhedral Oligomeric Silsesquioxane Nanocomposites

2010 ◽  
Vol 295 (9) ◽  
pp. 846-858 ◽  
Author(s):  
Miguel Sánchez-Soto ◽  
Silvia Illescas ◽  
Henry Milliman ◽  
David A. Schiraldi ◽  
Asier Arostegui
Keyword(s):  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermomechanical Properties ◽  
Oligomeric Silsesquioxane

scholarly journals Fluoroalkyl POSS with Dual Functional Groups as a Molecular Filler for Lowering Refractive Indices and Improving Thermomechanical Properties of PMMA

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1332 ◽  
Author(s):  
Kazunari Ueda ◽  
Kazuo Tanaka ◽  
Yoshiki Chujo
Keyword(s):  
Refractive Index ◽  
Methyl Methacrylate ◽  
Functional Groups ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Thermomechanical Properties ◽  
Optical Measurements ◽  
Refractive Indices ◽  
Casting Method ◽  
Dual Functional ◽  
Oligomeric Silsesquioxane

The dual-functionalized polyhedral oligomeric silsesquioxane (POSS) derivatives, which have the seven fluorinated alkanes and the single acrylate ester on the silica cube, were designed as a filler for lowering the refractive index (RI) and improving thermomechanical properties in poly(methyl methacrylate) (PMMA). The desired dual-functionalized POSS fillers were prepared, and because of its high miscibility, homogeneous films were readily obtained, by the casting method, with the mixture solutions containing the modified POSS and the polymers. From optical measurements, it was found that the larger effects of lowering the RIs of the PMMA matrices were observed from the modified POSS than those of the octa-substituted POSS derivatives with the homogeneous substituents. It should be mentioned that the degradation temperatures and the storage moduli were able to be greatly elevated by loading the present POSS fillers. Finally, it was demonstrated that the methacrylate ester-tethered POSS should be the most effective filler for modulating PMMA (Δn = −0.020, ΔTd20 = +53 °C, ΔE'/E' = +72%).

scholarly journals Blends of Cyanate Ester and Phthalonitrile–Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 54 ◽  
Author(s):  
Xiaodan Li ◽  
Fei Zhou ◽  
Ting Zheng ◽  
Ziqiao Wang ◽  
Heng Zhou ◽  
...  
Keyword(s):  
Chemical Reactivity ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Far Infrared ◽  
Mechanical Analysis ◽  
Cyanate Ester ◽  
Scanning Calorimetry ◽  
Good Thermal Stability ◽  
Cure Behavior ◽  
Low Viscosity ◽  
Oligomeric Silsesquioxane

Blends of cyanate ester and phthalonitrile–polyhedral oligomeric silsesquioxane copolymers were prepared, and their cure behavior and properties were compared via differential scanning calorimetry (DSC) analysis, thermogravimetric (TG) analysis, dynamic mechanical analysis, Fourier-transform far-infrared (FTIR) spectroscopy, and rheometric studies. The copolymer blends showed high chemical reactivity, low viscosity, and good thermal stability (TG temperatures were above 400 °C). The glass-transition temperature of the blends increased by at least 140 °C compared to cyanate ester resin. The blends are suitable for preparing carbon-fiber-reinforced composite materials via a winding process and a prepreg lay-up process with a molding technique. The FTIR data showed that the polymerization products contained triazine-ring structures that were responsible for the superior thermal properties.

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
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