Synthesis, characterization, and thermal degradation kinetic of polystyrene‐g‐polycaprolactone

Abstract

In the present study, it has been demonstrated that polystyrene‐g‐polycaprolactone (PS‐g‐PCL) was successfully prepared by “click chemistry.” For this purpose, first, poly(styrene‐co‐4‐chloromethylstyrene) (P(S‐co‐CMS)) with 4‐chloromethylstyrene content (10%) was synthesized. Second, alkyne‐functionalized polycaprolactone (PCL) was obtained using propargyl alcohol and caprolactone. P(S‐co‐CMS) and PCL were reacted in N,N‐dimethylformamide for 24 h at 25°C to give PS‐g‐PCL. The synthesized polymer was characterized by nuclear magnetic resonance (1H‐NMR), gel permeation chromatography, Fourier transform infrared spectroscopy and thermogravimetric analysis. The apparent activation energies for thermal degradation of PS‐g‐PCL were obtained by differential (Kissenger) and integral methods (Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose, Tang, Coats–Redfern, Van Krevelen et al.). The decomposition mechanism and pre‐exponential factor were calculated in terms of Coats–Redfern method. The most likely decomposition processes of first and second degradation stages were An type and F3 type, respectively. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Reinforcement of Microbial Thermoplastics by Grafting to Polystyrene with Propargyl-Terminated Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)

“…Synthesis of Poly(p-azidemethylstyrene-co-styrene) (P(AMS-co-St)). P(AMS-co-St) was synthesized by azidation of poly(p-chloromethylstyrene-co-styrene) (P(CMS-co-St)) with sodium azide, referred by the previous studies 41,42 (Scheme 1). In this experiment, two types of P(AMS-co-St) with different AMS unit ratios (5 mol % and 20 mol %) were prepared.…”

Synthesis, characterization and thermokinetic analysis of the novel sugar based styrene co-polymer

“…All of aldehyde groups were formed at the same time as terminal groups, while the monosaccharide ring was damaged. The main degradation reactions began at the temperature of circa 350 °C, aromatic rings such as substituted benzene and furan structures with groups such as -CH 2 -or -CH 2 -O-CH 2 -as main binders between the aromatic rings could be seen [62] .…”

Synthesis, characterization and thermal degradation of cross-linked polystyrene using the alkyne-functionalized esters as a cross-linker agent by click chemistry method

“…[19] A typical procedure for the preparation of PS-N3 from 10 mol % CMS containing P(S-co-CMS) is as follows: P(S-co-CMS) (1.0 g, 1.04 ×10 -4 mol) was dissolved in DMF, and NaN 3 (0.07 g, 1.01 ×10 -3 mol) was added. The resulting solution was allowed to stir at 25 °C overnight and precipitated in excess methanol/water mixture (1/1 by volume).…”