Application of FTIR spectroscopy to determine transport properties and water–polymer interactions in polypropylene (PP)/poly(ethylene-co-vinyl alcohol) (EVOH) blend films: Effect of poly(ethylene-co-vinyl alcohol) content and water activity

Polymer ◽  
2009 ◽  
Vol 50 (13) ◽  
pp. 2981-2989 ◽  
Author(s):  
Aurora Lasagabáster ◽  
María José Abad ◽  
Luis Barral ◽  
Ana Ares ◽  
Rebeca Bouza
Keyword(s):  
Ftir Spectroscopy ◽  
Transport Properties ◽  
Water Activity ◽  
Vinyl Alcohol ◽  
Alcohol Content ◽  
Blend Films ◽  
Polymer Interactions ◽  
Poly Ethylene

Poly(ethylene-co-vinyl alcohol-co-vinyl mercaptoacetate) (EVALSH)-determination of the vinyl mercaptoacetate content by thermogravimetric analysis and FTIR spectroscopy

1996 ◽  
Vol 36 (5) ◽  
pp. 593-600 ◽  
Author(s):  
R. C. L. Dutra ◽  
V. L. Louren�o ◽  
M. F. Diniz ◽  
M. F. P. Azevedo ◽  
R. V. Barbosa ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Ftir Spectroscopy ◽  
Vinyl Alcohol ◽  
Poly Ethylene

Free volume defects and transport properties of mechanically stable polyhedral oligomeric silsesquioxane embedded poly(vinyl alcohol)‐poly(ethylene oxide) blend membranes

2019 ◽  
Vol 68 (7) ◽  
pp. 1280-1291 ◽  
Author(s):  
Valiya Parambath Swapna ◽  
Padinharu Madathil Gopalakrishnan Nambissan ◽  
Selvin P Thomas ◽  
Abitha Vayyaprontavida Kaliyathan ◽  
Thomasukutty Jose ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Transport Properties ◽  
Free Volume ◽  
Vinyl Alcohol ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Poly Vinyl Alcohol ◽  
Blend Membranes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Oligomeric Silsesquioxane

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.

Effect of Cobalt Stearate and Vegetable Oil on Uv and Biodegradation of Linear Low-Density Poly(Ethylene)-Poly(Vinyl Alcohol) Blends

2011 ◽  
Vol 2 (4) ◽  
pp. 131-148 ◽  
Author(s):  
Francis Vidya ◽  
Subin S. Raghul ◽  
Sarita G Bhat ◽  
Eby Thomas Thachil
Keyword(s):  
Vegetable Oil ◽  
Vinyl Alcohol ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Low Density ◽  
Compression Moulding ◽  
Melt Mixing ◽  
Degradation Behaviour ◽  
Moulding Process ◽  
Poly Ethylene

The main objective of this study was to enhance the rate of UV and biodegradation of polyethylene by incorporating biodegradable materials and prooxidants. Prooxidants such as transition metal complexes are capable of initiating photooxidation and polymer chain cleavage, rendering the product more susceptible to biodegradation. In this work, the effect of (1) a metallic photoinitiator, cobalt stearate, and (2) different combinations of cobalt stearate and vegetable oil on the photooxidative degradation of linear low-density poly(ethylene)-poly(vinyl alcohol) (LLDPE/PVA) blend films has been investigated. For this, film-grade LLDPE was blended with different proportions of PVA. PVA is widely used in the industrial field, and recently it has attracted increasing attention as a water-soluble biodegradable polymer. Cobalt stearate and vegetable oil were added to the blends as prooxidants. The blends were prepared by melt mixing in a Thermo HAAKE Polylab system. Thin films containing these additives were prepared by a subsequent compression moulding process. The effect of UV exposure on LLDPE/PVA films in the presence as well as absence of these additives was investigated. Tensile properties, FTIR spectra, and scanning electron microscopy (SEM) were employed to investigate the degradation behaviour. It was found

Sign in / Sign up

Export Citation Format

Share Document