2017
DOI: 10.1177/0040517517703597
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Thermal analysis and melt spinnability of poly(acrylonitrile-co-methyl acrylate) and poly(acrylonitrile-co-dimethyl itaconate) copolymers

Abstract: This work investigated the cyclization possibility and melt spinnability of carbon fiber precursors, poly(acrylonitrile-co-methyl acrylate) (AN/MA) and poly(acrylonitrile-co-dimethyl itaconate) (AN/DMI). The onset temperature of cyclization of the AN/DMI copolymer is lower than that of the AN/MA copolymer and also the polyacrylonitrile (PAN) homopolymer. The enthalpy (ΔH) of the AN/DMI copolymer is about 3–4 times that of the PAN homopolymer and about 1.8 times that of the AN/MA copolymer, indicating that the … Show more

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Cited by 8 publications
(6 citation statements)
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“…The mobile phase was dimethylformamide with a feed volume of 20 μL; the temperature of the column temperature box was 50 °C; the detector was an RI with a flow rate of 1 mL/min, and the standard sample was polystyrene. PDI was calculated as follows P D I = M normalw M normaln where M w is the weight-averaged molecular weight, and M n is the number-averaged molecular weight.…”
Section: Methodsmentioning
confidence: 99%
“…The mobile phase was dimethylformamide with a feed volume of 20 μL; the temperature of the column temperature box was 50 °C; the detector was an RI with a flow rate of 1 mL/min, and the standard sample was polystyrene. PDI was calculated as follows P D I = M normalw M normaln where M w is the weight-averaged molecular weight, and M n is the number-averaged molecular weight.…”
Section: Methodsmentioning
confidence: 99%
“…A similar idea of using a comonomer facilitating cyclization was described in [ 80 , 82 , 83 ] as illustrated by ternary and binary copolymers of AN, MA, and dimethyl itaconate. Ternary copolymer with a content of AN of 80–90 mol.% forms a stable melt at temperatures of 175–210 °C, and the melt-spun white fiber is characterized by a tensile strength of 13.3–31.0 cN/tex and elongation at break of 10–30% [ 82 ].…”
Section: Chemical Approach To Reduction Of Melting Point: Selection O...mentioning
confidence: 97%
“…For copolymers with M n = 110–130 kg⋅mol −1 , Đ = 2.2–2.8, and MA content of 10–15 mol.%, melting is observed at 250 °C, but stability of the melt does not exceed 4 min. With an increase in temperature of 10 °C, the stability of the melt is lower, and cyclization is completed in about half an hour [ 80 ]. Melting of AN and MA copolymers of a lower MW (M n ~20 kg⋅mol −1 ) proceeds at temperatures of 200–210 °C, while the TOS lasts for about a day at 220 °C [ 81 ].…”
Section: Chemical Approach To Reduction Of Melting Point: Selection O...mentioning
confidence: 99%
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“…Com o intuito de modificar as propriedades da PAN homopolímero vários comonômeros tais como ácido acrílico (AA), ácido metacrílico (MAA), ácido itacônico (IA), acrilato de metila (MA) e metacrilato de metila (MMA) possuem registro de copolimerização com a acrilonitrila. O monômero de MA é geralmente usado industrialmente para a melhoria das propriedades de fiação por fusão de copolímeros de PAN, pois reduzem a interação entre os grupos nitrílicos, reduzem a energia de ativação, reduzem a formação de estruturas core-shell e aumentam a solubilidade [16].…”
Section: Introductionunclassified