Dramatic enhancement of photo-oxidation stability of a conjugated polymer in blends with organic acceptor

2008 ◽  
Vol 92 (24) ◽  
pp. 243311 ◽  
Author(s):  
Ilya V. Golovnin ◽  
Artem A. Bakulin ◽  
Sergey A. Zapunidy ◽  
Elena M. Nechvolodova ◽  
Dmitry Yu. Paraschuk
Keyword(s):  
Conjugated Polymer ◽  
Oxidation Stability ◽  
Photo Oxidation ◽  
Organic Acceptor

Raman spectroscopy of intermolecular charge transfer complex between a conjugated polymer and an organic acceptor molecule

2007 ◽  
Vol 127 (10) ◽  
pp. 104905 ◽  
Author(s):  
V. V. Bruevich ◽  
T. Sh. Makhmutov ◽  
S. G. Elizarov ◽  
E. M. Nechvolodova ◽  
D. Yu. Paraschuk
Keyword(s):  
Raman Spectroscopy ◽  
Charge Transfer ◽  
Conjugated Polymer ◽  
Charge Transfer Complex ◽  
Acceptor Molecule ◽  
Intermolecular Charge Transfer ◽  
Organic Acceptor

Photo-Oxidation of Polyethylene Composites with Different Interfacial Interactions

2005 ◽  
Vol 475-479 ◽  
pp. 1037-1040 ◽  
Author(s):  
Rui Yang ◽  
Jian Yu ◽  
Kun Hua Wang
Keyword(s):  
High Density Polyethylene ◽  
Oxidation Behavior ◽  
Oxidation Stability ◽  
Oxidation Mechanism ◽  
Coupling Agents ◽  
Interfacial Interactions ◽  
Photo Oxidation ◽  
Outdoor Application ◽  
Properties Of Composites ◽  
Polyethylene Composites

The photo-oxidation stability is crucial for the materials that are exposed to outdoor application. For polyethylene, it has been investigated thoroughly and the auto-oxidation mechanism has been widely accepted. Nevertheless, the photo-oxidation of polyethylene composites, the most widely used materials, has not attracted enough attention yet. It is well known that the mechanical properties of composites are of great difference to that of matrix polymers, due to the introduction of the fillers and the different interfacial interactions between the matrices and the fillers. Also the oxidation behavior of composites have interesting characteristics owing to the various fillers and interfacial interactions, which always depend on the coupling agents. In the present work, the natural photo-oxidation of high-density polyethylene composites was studied. The results showed that the coupling agent had the most important but different influence on the oxidation stability of the composites, according to the different fillers.

Effects of photo-oxidation on conjugated polymer films

1997 ◽  
Vol 71 (11) ◽  
pp. 1483-1485 ◽  
Author(s):  
G. D. Hale ◽  
S. J. Oldenburg ◽  
N. J. Halas
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Photo Oxidation

scholarly journals Encapsulation of β-Carotene by Emulsion Electrospraying Using Deep Eutectic Solvents

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 981 ◽  
Author(s):  
Ahmet Ozan Basar ◽  
Cristina Prieto ◽  
Erwann Durand ◽  
Pierre Villeneuve ◽  
Hilal Turkoglu Sasmazel ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Oxidation Stability ◽  
Deep Eutectic Solvents ◽  
Water Soluble ◽  
Whey Protein Concentrate ◽  
Photo Oxidation ◽  
Wide Range ◽  
Poorly Water Soluble ◽  
Solubilized Form ◽  
Β Carotene

The encapsulation β-carotene in whey protein concentrate (WPC) capsules through the emulsion electrospraying technique was studied, using deep eutectic solvents (DES) as solvents. These novel solvents are characterized by negligible volatility, a liquid state far below 0 °C, a broad range of polarity, high solubilization power strength for a wide range of compounds, especially poorly water-soluble compounds, high extraction ability, and high stabilization ability for some natural products. Four DES formulations were used, based on mixtures of choline chloride with water, propanediol, glucose, glycerol, or butanediol. β-Carotene was successfully encapsulated in a solubilized form within WPC capsules; as a DES formulation with choline chloride and butanediol, the formulation produced capsules with the highest carotenoid loading capacity. SEM micrographs demonstrated that round and smooth capsules with sizes around 2 µm were obtained. ATR-FTIR results showed the presence of DES in the WPC capsules, which indirectly anticipated the presence of β-carotene in the WPC capsules. Stability against photo-oxidation studies confirmed the expected presence of the bioactive and revealed that solubilized β-carotene loaded WPC capsules presented excellent photo-oxidation stability compared with free β-carotene. The capsules developed here clearly show the significant potential of the combination of DES and electrospraying for the encapsulation and stabilization of highly insoluble bioactive compounds.

The influence of thermal annealing on the morphology and structural properties of a conjugated polymer in blends with an organic acceptor material

2009 ◽  
Vol 44 (12) ◽  
pp. 3192-3197 ◽  
Author(s):  
David E. Motaung ◽  
Gerald F. Malgas ◽  
Christopher J. Arendse ◽  
Sipho E. Mavundla ◽  
Clive J. Oliphant ◽  
...  
Keyword(s):  
Structural Properties ◽  
Thermal Annealing ◽  
Conjugated Polymer ◽  
Organic Acceptor

A photo-oxidation mechanism for patterning and hologram formation in conjugated polymer/glass composites

2000 ◽  
Vol 88 (3) ◽  
pp. 1236-1243 ◽  
Author(s):  
Ofer Levi ◽  
Galina Perepelitsa ◽  
Dan Davidov ◽  
Shoshy Shalom ◽  
Iris Benjamin ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Oxidation Mechanism ◽  
Glass Composites ◽  
Photo Oxidation ◽  
Polymer Glass

Photo-Oxidation Reveals H-Aggregates Hidden in Spin-Cast-Conjugated Polymer Films as Observed by Two-Dimensional Polarization Imaging

2019 ◽  
Vol 31 (21) ◽  
pp. 8927-8936
Author(s):  
Juanzi Shi ◽  
Xiaofeng Xu ◽  
Yuxin Xia ◽  
Ruiyun Chen ◽  
Zafer Hawash ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Two Dimensional ◽  
Polarization Imaging ◽  
Photo Oxidation

Preparation and Photo-Oxidation Aging Behavior of Oriented Polylactic Acid

2021 ◽  
Vol 36 (4) ◽  
pp. 451-458
Author(s):  
Z.-Q. Li ◽  
L.-C. Ran ◽  
Y. Lang ◽  
T. Wu ◽  
Y. L. Chen ◽  
...  
Keyword(s):  
Polylactic Acid ◽  
Molecular Orientation ◽  
Retention Rate ◽  
Oxidation Stability ◽  
Aging Behavior ◽  
Photo Oxidation ◽  
Aging Properties ◽  
The Impact ◽  
Prolonged Aging Time ◽  
Orientation Structure

Abstract This study employed solid hot stretching technology to produce successfully specifically oriented polylactic acid (PLA) while investigating the impact of orientation structure on its photo-oxidation aging properties. After orientation, the molecular weight and mechanical properties retention rate of PLA were improved, and the crystallinity (Xc) increased in conjunction with prolonged aging time, while the molecular orientation failed to modify the mechanism responsible for PLA deterioration. Furthermore, an examination regarding the way in which the photo-oxidation stability of PLA was enhanced, demonstrated that the increased Xc and structural orientation were beneficial for delaying the photo-oxidation aging of PLA.

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