Chemical modification of styrene–butadiene–styrene co-polymer by grafting of N-carbamyl maleamic acid

Lassalle, Verónica Leticia; Failla, Marcelo Daniel; Vallés, Enrique M.; Martı́n-Martı́nez, José Miguel

doi:10.1163/1568561042708359

Cited by 10 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the basis of the previous discussion, we sought to prepare a new polymer‐supported Schiff base which combines nitrogen (‐NH 2 ), oxygen (CO), and mercaptopropyl (‐SH) groups. Polymer‐supported Schiff base has different applications such as environmental, biological, and biomedical . In addition, this kind of polymer would have the ability to adsorb metal ions and to remove dyes, organic matter, and proteins from the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, density functional theory studies, and sorption properties toward some divalent heavy metal ions of a new polystyrene‐supported 4‐(5‐mercapto‐1,3,4‐thiadiazol‐2‐ylimino) pentan‐2‐one polymer

Madani

Charef

Hellal

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

This work pertains to the synthesis, characterization, DFT, and sorption studies of a novel polystyrene-supported 4-(5-mercapto-1,3,4-thiadiazol-2-ylimino) pentan-2-one Schiff bases from 5-amino-1,3,4-thiadiazole-2-thiol (PSAc5A) and acetylacetone chloromethylated polystyrene (PSAc). This material was characterized by FTIR, elemental analysis, transmission electron microscopy, and thermogravimetric analysis (TGA). The chelating properties of the newly synthesized polymer toward the divalent metal Cu(II), Mn(II), Zn(II), and Ni(II) ions in aqueous solutions was studied by means of batch equilibration technique as a function of contact time, pH, mass of resin, and concentration of metal ions using atomic absorption spectrometry (AAS). Results obtained from this investigation revealed that this polymer can be used to remove heavy metal ions from the aquatic environment. In addition, the molecular structural geometry, the theoretical description of charge distribution, chemical reactivity descriptors, frontier molecular orbitals, molecular electrostatic potential (MEP), and electronic and bonding nature of the monomer structure have been investigated by using the density functional theory (DFT) in order to gain insights into the nature of this compound.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis, density functional theory studies, and sorption properties toward some divalent heavy metal ions of a new polystyrene‐supported 4‐(5‐mercapto‐1,3,4‐thiadiazol‐2‐ylimino) pentan‐2‐one polymer

Madani

Charef

Hellal

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

Evolution of the Coefficient of Friction with Surface Wear for Advanced Surface Textured Composites

Anwer

Bagheri

Fernie

et al. 2017

Adv Materials Inter

View full text Add to dashboard Cite

In this study, textured composite surface with protruding fibers is developed, which exhibits extremely high coefficient of friction on ice. A novel composite material with improved wear resistibility is aimed to determine with the target to maintain its slip‐resistance properties over extended use. Particularly, two thermoplastic elastomers are compared, namely, thermoplastic polyurethanes (TPU) and Styrene–Butadiene–Styrene (SBS), reinforced with five types of fibers with varying stiffnesses and ductility, including alumina, basalt, glass, carbon, and poly(p‐phenylene‐2,6‐benzobisoxazole)) (PBO). The surface science of the composite is analyzed by using Fourier tranorm infrared spectroscopy to assess the intensity of existing interfacial bonding at fiber/matrix interface and scanning electron microscopy imaging for visual characterization. The results show that TPU composites have significantly higher abrasion resistance and slip resistance on ice as compared to SBS composites with the maximum abrasive resistance index (347.5 ± 29.5, p < 0.0001) and coefficient of friction on ice (0.375 ± 0.031, p < 0.0001) for PBO/TPU composite. Similarly, Fourier tranorm infrared spectroscopy spectrum demonstrates stronger existing bands in TPU compared to SBS composites indicative of better fiber wetting in TPU composites. The current PBO–TPU composite can be a potential candidate for various antislip applications as it has improved wear‐resistance (22%) and slip‐resistance (57%) properties, with respect to pure TPU.

show abstract

Grafting of N‐carbamyl maleamic acid onto a styrene–butadiene–styrene copolymer

Lassalle¹,

Failla²,

Vallés³

2006

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A styrene-butadiene-styrene block copolymer (SBS) was functionalized with N-carbamyl maleamic acid (NCMA) using two peroxide initiators with the aim of grafting polar groups onto the molecular chains of the polymer. The influence of the concentration of benzoyl peroxide (BPO) and 2,5-dimethyl, 2,5-diterbuthylperoxihexane (DBPH) was studied. The concentration of peroxy groups ranged between 0.75 and 6 Â 10 À4 mol % while the concentration of NCMA was constant at 1 wt %. The reaction temperature was chosen according to the type of peroxide employed, being 1408C for BPO and 1908C for DBPH. FTIR spectra confirmed that NCMA was grafted onto the SBS macromolecules. It was found that the highest grafting level was achieved at a concentration of peroxy groups of about 3 Â 10 À4 mol %. Contact angle measurements were used to characterize the surface of the SBS and modified polymers. The contact angle of water drops decreased with the amount of NCMA grafted from 958, the one corresponding to the SBS, to about 738. T-peel strength of polymer/polyurethane adhesive/polymer joints made with the modified polymers was larger than those prepared with the original SBS. The peel strength of SBS modified with 1.5 and 3 Â 10 À4 mol % of peroxy groups from BPO were five times larger than that of the original SBS. The materials modified using BPO showed peel strengths higher than the ones obtained with DBPH.

show abstract

Chemical modification of styrene–butadiene–styrene co-polymer by grafting of N-carbamyl maleamic acid

Cited by 10 publications

References 19 publications

Synthesis, density functional theory studies, and sorption properties toward some divalent heavy metal ions of a new polystyrene‐supported 4‐(5‐mercapto‐1,3,4‐thiadiazol‐2‐ylimino) pentan‐2‐one polymer

Synthesis, density functional theory studies, and sorption properties toward some divalent heavy metal ions of a new polystyrene‐supported 4‐(5‐mercapto‐1,3,4‐thiadiazol‐2‐ylimino) pentan‐2‐one polymer

Evolution of the Coefficient of Friction with Surface Wear for Advanced Surface Textured Composites

Grafting of N‐carbamyl maleamic acid onto a styrene–butadiene–styrene copolymer

Contact Info

Product

Resources

About