The Impact of AN Contribution on the Thermal Characteristics and Molecular Dynamics of Novel Acrylonitrile-Styrene-Styrene Sodium Sulfonate Terpolymers.

Hamud A Altaleb,Sayed Z Mohammady,Hany El-Hamshary,Abdullah M Al-Enizi

doi:10.3390/polym13030420

Hamud A Altaleb, Sayed Z Mohammady + Show 2 more

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https://doi.org/10.3390/polym13030420

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Journal: Polymers	Publication Date: Jan 28, 2021
Citations: 1	License type: CC BY 4.0

Affiliation: King Saud University, Cairo University, Tanta University

Abstract

We performed a free radical solution polymerization of new acrylonitrile (AN), styrene (St) and styrene sodium sulfonate (SSS) acceptor–donor acceptor monomer systems. The compositions and structures of the produced terpolymers were elucidated using CHNS elemental analysis, and Fourier transform infrared (FTIR) spectroscopies. Three terpolymers candidates were chosen for detailed thermal investigations, where the AN molar ratio varied almost threefold (from ~6.9% to ~17.4%) while the molar ratios of St and SSS varied slightly, at average values around 76.0% and 12.9%, respectively. The glass transition (Tg) values of the terpolymers were measured calorimetrically. In addition, thermal gravimetric analyses (TGA) of the samples were conducted in the temperature range from room temperature to 800 °C. All terpolymers exhibited a single Tg value, indicating random copolymerization of the monomeric species. TGA results revealed that variation of the AN molar ratio had a significant influence on the thermal stabilities of the terpolymers. The impact of AN contribution on the molecular dynamics of the glass transition in the terpolymers was explained quantitatively in a framework of a molecular model.

Highlights

Received: 3 January 2021The preparation of multi-component polymers is a well-established method for producing polymers with chemical and physical properties for pre-defined purposes
Despite the richness of the literature on the expansive and detailed information on the co-polymerization processes of two-monomer systems, when we compared the material, we found that a very limited number of studies have been devoted to studying the preparation and characterization of polymers
1430 cm correspond to the (CN) of the AN monomers participating in the terpolymer

Summary

Introduction

Received: 3 January 2021The preparation of multi-component polymers is a well-established method for producing polymers with chemical and physical properties for pre-defined purposes. We can control the determination of elasticity by a calculated modification in the design of these polymers. This is often done by using additional monomers with different characteristics, which may be two or more [1,2], in polymerization. The co-polymer composition is the most influential factor on the final properties and depends on the participation ratios of the monomers involved in the resulting polymer. The reactive ratios are important for predicting the microstructure, polymerization rate, and the molecular weight distribution of polymers. Copolymerization was performed for the following pairs of monomers: BA/MMA, BA/VAc, and MMA/VAc. Studies have demonstrated that the produced polymers are distinguished by conversion, structure, and molecular weight. One of the most important results of this work is to reach an accurate

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