Poly (phenylene sulfide): polymerization kinetics and characterization

Rajan, C. R. ; Ponrathnam, S. ; Nadkarni, V. M. (1986) Poly (phenylene sulfide): polymerization kinetics and characterization Journal of Applied Polymer Science, 32 (4). pp. 4479-4490. ISSN 0021-8995

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/app.198...


The polycondensation kinetics of aromatic nucleophilic substitution on 1,4-dichlorobenzene by sodium sulfide has been investigated at 195°C in N-methyl pyrrolidone. The reaction follows second-order kinetics. The rate is bimodal with an initial slow rate till 50% conversion followed by a faster rate between 50 and 97% conversion. The specific reaction rates have been evaluated as 3.97 × 10-3 L m-1 s-1 and 1.02 × 10-2 L m-1 s-1 for the initial and later part (50-97%) of the reaction. The development of the degree of polymerization with reaction time was followed by end-group analysis and intrinsic viscosity measurements of polymer samples collected at different conversions. The reaction differs from conventional polycondensation reactions in two aspects. Polymer formation occurs at low conversions, and a significant amount of uncreacted monomer is present even at very high conversions. Unlike other precipitation polymerization reactions, the polymer chain continues to grow even after precipitation.

Item Type:Article
ID Code:22591
Deposited On:24 Nov 2010 08:13
Last Modified:08 Jun 2011 06:27

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