Synthesis, Characterization and Biological Activity of Saturated and Unsaturated Copolyesters Based on Bisphenol-A
Ahmed
Abd-Elsalam Khalil
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
author
Amal
A.Mahmoud
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
author
Laila
M.Reda
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
author
text
article
2010
eng
SATURATED copolyesters were prepared by polyesterification of bisphenol-A (BPA) and phthalic anhydride or tetrabromophthalic anhydride with ethylene glycol, diethylene glycol, 1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, and cis-2-butene-1,4-diol. Also, unsaturated copolyesters were prepared by polyesterification of bisphenol-A and maleic anhydride with the same glycols. All the copolyester resins obtained have been characterized; unsaturated copolyesters were found to cure with styrene. The properties of the copolyester in the form of films were determined. Also, the fire retardancy of polyesters was evaluated as varnish films on plywood strips. IR and 1HNMR spectroscopy were used for characterization of the copolyester resins. The antimicrobial activity of the copolyesters obtained was examined against gram-positive and gram-negative bacteria.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
65
81
https://jtcps.journals.ekb.eg/article_30520_60c08cd749fb8623fdbb73dc54ec85eb.pdf
dx.doi.org/10.21608/jtcps.2010.30520
The Effect of Machine Setting On Weft- Knitted Fabric Properties
Z. M.
Abdel-Megied
Textile Research Division, National Research Centre, Cairo
author
M.A.
ELBakry
*Faculties of Specific Education, Home Economics, Mansoura University, Egypt.
author
text
article
2010
eng
IN the field of garments manufacture produced from circular weft …. knitted fabrics, it is important that we understand the variables and processes used so that we can predict their impact on dimensional changes. This helps in solving technical problems and satisfying consumer needs. The present investigation was carried out using circular knitting machine gauge 24. It identified the effect of changing various settings of the machine on the characteristics of the knitted fabric produced. Three fabrics were used from combed cotton yarns with count 20/1, 24/1and 30/1 Ne to produce (parasula) single jersey. A regression analysis equation was used to predict fabric specifications. The scheme of research depended on producing three knitted fabric samples from every count with different cylinder diameter opening. Therefore, nine samples were used to investigate the change that happened to the fabric after relaxation, such as: fabric width, fabric weight, stitch density at in wall and course directions, and stitch length. The second stage of investigation was after dyeing and drying all the samples, which were produced under the same condition to identify the extent of the change in their specifications. The final Finishing stage set the fabric width at four different measurements for all samples to study the effect of drying heat on the weight/m2, stitch density wall/course, stitch length and shrinkage in wall and course directions.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
83
96
https://jtcps.journals.ekb.eg/article_30521_e3682ea6e0725634a51ed76d286acc91.pdf
dx.doi.org/10.21608/jtcps.2010.30521
A Comparative Study for Reactive (Blue 19) Dye Adsorption Onto Polyaniline Prepared by Both Aps and Catalyzed H2o2 Pathways.
A.G.
Gadallah
Department of Chemical Engineering,, Natiomal Research Centre
author
M.A.
Abd El-Ghaffar
Department of Polymers and Pigments, Natiomal Research Centre
author
N.N.
Ibiari
Department of Polymers and Pigments, Natiomal Research Centre,
author
text
article
2010
eng
IN THE present study, polyaniline (PANI), chemically synthesized …..using ammonium peroxydisulfate [APS] and by catalyzed hydrogen peroxide (H2O2), was evaluated as adsorbents for reactive (blue 19) dye. Experiments were conducted in batch mode where some parameters affecting the adsorption capacity such as contact time and concentration of dye have been investigated. An atomic absorption spectroscopy method was used for the measurement of dye contents. Adsorption equilibrium was achieved within 60 min and the adsorption capacity (qe) was 350 mg /gm (PANI) under the optimal conditions. Adsorption equilibrium studies were carried out and showed that adsorption follows the Freundlich model. The adsorption kinetics was best described by the pseudo-second-order model. The results indicated that PANI, synthesized by catalyzed hydrogen peroxide (H2O2) can be used as a novel effective adsorbent material for the removal of the tested reactive dye with higher adsorption capacity than PANI prepared by APS.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
97
112
https://jtcps.journals.ekb.eg/article_30552_f517ca43c20c2338c8ef7f6d5fc50c91.pdf
dx.doi.org/10.21608/jtcps.2010.30552
Conductivity Studies of Acrylonitrile Butadiene Rubber Composites Loaded with Different Types of Carbon Blacks
R.M.M.
Morsi
Dept. of Physical Chemistry and *Dept. of Polymers and Pigments, National Research Centre, Cairo, Egypt
author
, M.N.
Ismail
Dept. of Physical Chemistry and *Dept. of Polymers and Pigments, National Research Centre, Cairo, Egypt
author
A.A.
Yehia
Dept. of Physical Chemistry and *Dept. of Polymers and Pigments, National Research Centre, Cairo, Egypt.
author
text
article
2010
eng
THE EFFECT of three types of carbon blacks namely: High abrasion furnace black (HAF), graphite and acetylenic carbon black on the electrical and mechanical properties of NBR composites were investigated. The conductivity of NBR composites is found to be 7 orders of magnitude higher than that of the filler-free NBR. It reaches ~10−3 S cm−1 at ~30oC in case of NBR composites loaded with acetylenic carbon black. The tensile strength of NBR/filler composites has been markedly increased, indicating high reinforcement efficiency, i.e., good interaction between the fillers and NBR. The NBR/HAF composites have the highest tensile strength, then NBR/Acetylenic CB and then NBR/graphite composites. The elongation at break of NBR/ filler composites was found to decrease with increasing the filler content.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
113
126
https://jtcps.journals.ekb.eg/article_30564_f3b6be9014b69517b7285f319b50854b.pdf
dx.doi.org/10.21608/jtcps.2010.30564
Modification and Characterization of Aromatic Polyamide Reverse Osmosis membranes Doped TiO2 Nanoparticles
M.H.
El-Sayed
Hydrogeochemistry Dept., Desert Research Center, El-Mataryia,
author
A.M.
El-Aassar
Hydrogeochemistry Dept., Desert Research Center, El-Mataryia,
author
M.M.
Aboel-Fadl
Hydrogeochemistry Dept., Desert Research Center, El-Mataryia,
author
M.A.
El-Sheikh
Hydrogeochemistry Dept., Desert Research Center, El-Mataryia,
author
M. M.
Emara
Chemistry Dept., Faculty of Science, Al-Azhar Univ.
author
M.S.
Abdel-Mottaleb
Chemistry Dept. Faculty of Science, Ain Shams Univ. Cairo, Egypt
author
text
article
2010
eng
SYNTHESIS, characterization and reverse osmosis (RO) performance of modified polyamide (PA) membranes were studied. The modification includes acrylic acid (AAc) grafting and titanium dioxide (TiO2) nano-particles doping using the phase inversion method and chemically initiated procedure by benzoyl peroxide (BPO). The synthesized membranes elucidated good chemical stability with improved swelling behavior. XRD, mechanical properties, thermal stability and the surface morphology using atomic force microscope-tapping mode (AFM-TM) were studied.
RO performance of synthesized membranes was evaluated. The water flux increases by the increase of LiCl, AAc and TiO2 concentration and applied pressure. While, the salt rejection (%) increases by the increase of AAc grafting (%), solvent evaporation and applied pressure. The synthesized PA-AAc-TiO2 nano-composite membrane possesses good acceptable RO performance suitable for water desalination.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
127
148
https://jtcps.journals.ekb.eg/article_30571_3ff87f2d31ba2ab8c7c78cf70b4815f3.pdf
dx.doi.org/10.21608/jtcps.2010.30571
New Application of Polyurethane Polymers for Consolidation of A Deteriorated Oil Painting of Salvator Rosa
Osama M.
El-Feky
Restoration and Conservation Department, Faculty of Archaeology, Cairo University, Giza, Egypt.
author
text
article
2010
eng
THE OIL painting “Scene of a Battle” executed by famous Italian Baroque painter Salvator Rosa (1615 - 1673) on a canvas support. It was weak, had cleavages, cracks, separation between the layers, and also blind cleavage in many sections. Scanning electron microscope (SEM), x-ray diffraction (XRD), energy dispersive analysis of x-rays (EDAX), fourier transform infrared (FT-IR) and carbon-13 nuclear magnetic resonance (13CNMR) analyses were applied on micro fragments. The obtained results indicated that the artist used a canvas of linen, calcium carbonate mixed with animal glue for the preparation of the background of the paintings. The main pigments of the paint layers are iron aluminum silicate for red, iron sulfate for yellow, calcium iron oxide for yellowish green, lead carbonate hydroxide for white, carbon for black, mixed with linseed oil for painting. The laboratory study was carried out on six polymers of polyurethane to select the best one to be used for the consolidation of the oil painting. Its physical characteristics (color changes and tensile properties) in addition to the chemical structure were determined before and after exposure to artificial aging. The results indicate that Idrocap 990 polyurethane polymer gave more improvement in strength and stiffness and had a high stability against artificial aging processes and safe to use for restoration and preservation of oil paintings. Based on the obtained results, the oil painting was treated and restored. The consolidation process of the oil painting was carried out using Idrocap 990 polyurethane polymer to restore the bond between all structural elements of the oil painting. The polymer was applied by using a small brush along the cleaved paint and into the cracks or applied using a syringe in the case of blind cleavage to inject the polymer from the canvas reverse. The consolidation process is a suitable solution for the oil paintings which suffer from weakness and had cleavages.
Oil painting, Salvator Rosa’s painting technique, Conservation, Restoration, Consolidation, Polyurethane.
Journal of Textiles, Coloration and Polymer Science
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology( ASRT)
2682-2024
14
v.
2
no.
2010
149
166
https://jtcps.journals.ekb.eg/article_30574_468c03ed30657b0e4fc18bd35b2040d2.pdf
dx.doi.org/10.21608/jtcps.2010.30574