New Evaluation Methods of Average Molecular Weight and the Degree of Branching of Poly(1,4-phenylene sulfide) Samples through Their Partial Sulfonation 


Vol. 23,  No. 4, pp. 900-913, Apr.  2022
10.1007/s12221-022-4663-5


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  Abstract

Structural characterization of industrial-grade poly(1,4-phenylene sulfide) (PPS) batch samples (solution- and melt-polymerized) can only be carried out using expensive and least available solid-state NMR/high-thermal viscometer due to their insolubility in common organic solvents even at 200 oC. In the present study, we prepared sulfonated PPS (sPPS) which is soluble in common organic solvents even at ambient temperature conditions, thereby facilitating its easier characterization in the solution state at R.T. using FTIR, NMR, and solution-viscosity measurements. sPPS was synthesized through the anionic modification of PPS using chlorosulfonic acid (ClSO3H) and dichloromethane as a function of varying PPS:ClSO3H mole ratio (1:5 and 1:10) and sulfonation time (1 to 48 h). A previously unreported methodology to identify the branching types (phenylene and sulfide branching) in PPS was carried out using 1H-NMR curve-fitting analysis with Lorentzian equation. Melt-polymerized PPS samples were analyzed to contain about two times higher degree of branching than the solution-polymerized PPS ones.

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  Cite this article

[IEEE Style]

S. Pervin, A. A. Prabu, K. J. Kim, "New Evaluation Methods of Average Molecular Weight and the Degree of Branching of Poly(1,4-phenylene sulfide) Samples through Their Partial Sulfonation," Fibers and Polymers, vol. 23, no. 4, pp. 900-913, 2022. DOI: 10.1007/s12221-022-4663-5.

[ACM Style]

Shamim-Ara Pervin, Arun Anand Prabu, and Kap Jin Kim. 2022. New Evaluation Methods of Average Molecular Weight and the Degree of Branching of Poly(1,4-phenylene sulfide) Samples through Their Partial Sulfonation. Fibers and Polymers, 23, 4, (2022), 900-913. DOI: 10.1007/s12221-022-4663-5.

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pISSN : 1229 - 9197
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