Accurate real time optical transmission study of vulcanized poly (ethylene-co-vinyl acetate) in aromatic solvent

2013 ◽  
Author(s):  
Satheesh Chandran ◽  
P. Ashok ◽  
P. Anin ◽  
A. Sujith ◽  
Ravi Varma
Keyword(s):  
Real Time ◽  
Vinyl Acetate ◽  
Optical Transmission ◽  
Aromatic Solvent ◽  
Transmission Study ◽  
Poly Ethylene

The real time optical transmittance of swollen heterogeneous natural rubber/poly (ethylene-co-vinyl acetate) blends

2017 ◽  
Vol 37 (3) ◽  
pp. 307-311
Author(s):  
Satheesh Chandran ◽  
Ashok Panayamthatta ◽  
Ravi Varma ◽  
Sujith Athiyanathil
Keyword(s):  
Natural Rubber ◽  
Real Time ◽  
Vinyl Acetate ◽  
Optical Switching ◽  
Molecular Size ◽  
Optical Transmittance ◽  
Optical Transparency ◽  
Simple Method ◽  
Crosslinked Polymer ◽  
Poly Ethylene

Abstract This work demonstrates a novel simple method to study the accurate real time optical transparency of a crosslinked polymer blend during its swelling in good solvent. Heterogeneous natural rubber (NR) and poly (ethylene-co-vinyl acetate) (EVA) blends were used for this experiment. Aromatic solvents such as benzene, toluene and xylene were used as the probe molecules. Optical transparency of the samples increases with increase in EVA content in the blends during swelling. The penetrant solvent molecular size also affects the optical transparency of the blends. This new method can effectively measure the optical transparency of polymer gels during their swelling. Also, these blends can be a promising material for optical switching.

Contribution to the determination of relative increment of internal energy at low deformation of cross-linked rubber

1980 ◽  
Vol 45 (8) ◽  
pp. 2315-2318 ◽  
Author(s):  
Vladimír Pollák ◽  
Andrej Romanov
Keyword(s):  
Internal Energy ◽  
Vinyl Acetate ◽  
Temperature Changes ◽  
Relative Increment ◽  
Poly Ethylene ◽  
Small Deformations

The relative charge of the internal energy, fU/f, during deformation of cross-linked elastomers, poly(ethylene-co-propylene) and poly(ethylene-co-vinyl acetate), was determined at various temperatures. Anomalies in the dependence of fU/f on relative dilatation in the region of small deformations ( 35%) are to a large extent besides other factors due to the sensibility of the formula used to calculate fU/f to temperature changes.

scholarly journals Thermal Properties, Isothermal Decomposition by Direct Analysis in Real-Time-Of-Flight Mass Spectrometry and Non Isothermal Crystallization Kinetics of Poly(Ethylene-Co-Vinyl Alcohol)/Poly(ε-Caprolactone) Blend

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 292
Author(s):  
Abdulaziz Ali Alghamdi ◽  
Hussain Alattas ◽  
Waseem Sharaf Saeed ◽  
Abdel-Basit Al-Odayni ◽  
Ahmed Yacine Badjah Hadj Ahmed ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Real Time ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Vinyl Alcohol ◽  
Time Of Flight ◽  
Direct Analysis ◽  
Isothermal Crystallization Kinetics ◽  
Flight Mass Spectrometry ◽  
Poly Ethylene

A series of poly(ethylene-co-vinyl alcohol)/poly(ε-caprolactone) blends with different compositions were prepared using solvent casting. The miscibility of this pair of polymers was investigated using differential scanning calorimetry (DSC), and proved by a negative Flory interaction parameter value calculated from the Nishi–Wang equation. The miscibility of this blend was also confirmed by scanning electronic microscopy (SEM). The thermal behaviors of the obtained materials were investigated by DSC, thermogravimetric analysis, and direct analysis in real-time–time-of-flight mass spectrometry and the results obtained were very relevant. Furthermore, the crystalline properties of the obtained materials were studied by DSC and X-ray diffraction where the Ozawa approach was adopted to investigate the non-isothermal crystallization kinetics. The results obtained revealed that this approach described the crystallization process well.

Uniformly aligned liquid crystal molecules on reformed poly(ethylene-co-vinyl acetate) layers driven by ion beam exposure

2021 ◽  
pp. 1-10
Author(s):  
Dong Wook Lee ◽  
Eun Mi Kim ◽  
Gi Seok Heo ◽  
Ju Hwan Lee ◽  
Dong Hyun Kim ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Vinyl Acetate ◽  
Ion Beam ◽  
Poly Ethylene

Preparation of Well-Exfoliated Poly(ethylene-co-vinyl acetate)/α-Zirconium Phosphate Nanocomposites

Langmuir ◽  
2021 ◽  
Author(s):  
Mingzhen Zhao ◽  
Joseph Baker ◽  
Zhiyuan Jiang ◽  
Zewen Zhu ◽  
Hong-Mao Wu ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Zirconium Phosphate ◽  
Poly Ethylene
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