Near-Infrared and Rheological Investigations of Epoxy−Vinyl Ester Interpenetrating Polymer Networks

2001 ◽  
Vol 34 (19) ◽  
pp. 6623-6630 ◽  
Author(s):  
Katherine Dean ◽  
Wayne D. Cook ◽  
Laurent Rey ◽  
Jocelyne Galy ◽  
Henry Sautereau
Keyword(s):  
Vinyl Ester ◽  
Near Infrared ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks

The Influence of Reaction Kinetics on Polyurethane/Vinyl Ester Resin Interpenetrating Polymer Networks

2007 ◽  
Vol 15 (4) ◽  
pp. 329-335
Author(s):  
C.L. Qin ◽  
H.J. Niu ◽  
X.D. Bai ◽  
Y.C. Ding ◽  
W. Yang ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Vinyl Ester ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Vinyl Ester Resin

Mechanical and thermomechanical properties of vinyl ester/polyurethane IPN based nano-composites

2021 ◽  
pp. 096739112098734
Author(s):  
Jagesh Kumar Ranjan ◽  
Sudipta Goswami
Keyword(s):  
Tensile Strength ◽  
Vinyl Ester ◽  
Polymer Networks ◽  
Silica Nanoparticle ◽  
Thermomechanical Properties ◽  
Interpenetrating Polymer Networks ◽  
Blend Ratio ◽  
Organically Modified ◽  
The Matrix ◽  
Organically Modified Silica

Interpenetrating polymer networks of vinyl ester (VE) resin and polyurethane (PU) were synthesized using blend ratio of 93:7(w/w). Two sets of nanocomposites based on i) pure vinyl ester and ii)VE/PU IPN(93VE), were prepared with organically modified silica nanoparticle (OMS) as filler by 1, 2, 3 and 5% weight of the matrix resin. All the nanocomposites were characterized in terms of mechanical and thermomechanical properties.VE/silica nanocomposite with 2% filler (VES2) showed improvement in ultimate tensile strength by 83.5% and toughness by 42% compared to that of VE resin itself. The IPN based nanocomposite, 93VES2, exhibited 31.14%, 10.8% and 18%greater tensile strength, Young’s modulus and toughness respectively in comparison to that of the base 93VE IPN. IPN based nanocomposites were tougher than VE based nanocomposites. Storage modulus of nanocomposites was lower than that of 93VE and VE matrix system. Higher tanδmax of the 93VE/OMS nanocomposites than that of the 93VE matrix was indication of more elastic nature of the later. Smaller size of dispersed domains was found in SEM micrographs for IPN based nanocomposites than that in micrographs of VE based nanocomposites of corresponding composition.

scholarly journals Simultaneous and Gradient IPN of Polyurethane/Vinyl Ester Resin: Morphology and Mechanical Properties

2009 ◽  
Vol 2009 ◽  
pp. 1-6 ◽  
Author(s):  
Dongyan Tang ◽  
Xiaohong Zhang ◽  
Lili Liu ◽  
Liangsheng Qiang
Keyword(s):  
Mechanical Properties ◽  
Vinyl Ester ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Component Ratio ◽  
Vinyl Ester Resin ◽  
Time Intervals ◽  
Atomic Force ◽  
Gradient Component ◽  
Morphology And Mechanical Properties

A series of polyurethane (PU) and vinyl ester resin (VER) simultaneous and gradient interpenetrating polymer networks (represented as s-IPN and g-IPN, resp.) curing at room temperature were prepared by changing the component ratios of PU or VER in s-IPN, time intervals, and component ratio sequences of s-IPN in g-IPN. The microstructures of s-IPN and g-IPN were detected by atomic force microscope (AFM), dynamic mechanical analyzer (DMA), and surface constitution scanning of nitrogen element of energy dispersive X-ray spectrum (EDX), respectively. The mechanical properties of s-IPN and g-IPN were studied by values in strain-stress curves detected by electronic multipurpose tester. The results indicated that the morphology and mechanical properties are both affected by PU/VER component ratios in s-IPN, gradient time intervals, and gradient component ratio sequences. Furthermore, the morphology detection by EDX and mechanical properties study both proved the formation of gradient structures in transition regions of g-IPN.

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