Thermo-oxidative decomposition behavior of starch-g-poly(citronellyl methacrylate) and starch-g-poly(citronellyl acrylate) copolymers

Abstract

The paper describes the studies on the thermo-oxidative decomposition behavior of two types of starch graft copolymers: starch-g-poly(citronellyl acrylate) copolymers with the grafting percent (%G): 21.3% ± 0.5, 35.8% ± 0.6 and 59.8% ± 0.3 and starch-g-poly(citronellyl methacrylate) copolymers with %G: 21.3% ± 0.4, 37.0% ± 0.2 and 51.8% ± 0.3 prepared applying the ''grafting from'' method. The decomposition course of copolymers by using the TG/ DTG/DSC/FTIR analysis was evaluated. As it was found, the course of TG/DTG/DSC curves was independent on the %G but it was directly dependent on the type of analyzed copolymer. It resulted in completely different decomposition course of starch-g-poly(citronellyl acrylate) copolymers under the presence of oxidative conditions as compared to starch-gpoly(citronellyl methacrylate) copolymers. Thanks to applying the FTIR analysis of the gaseous products emitted under the heating of the studied materials, the detailed decomposition course of copolymers was evaluated.

Advances in studies of thermal degradation of polymeric materials Part I. Literature studies

“…Intensywnie badaną grupą związków są także polimery naturalne i biodegradowalne [np. celuloza, skrobia, chitozan, lignina, poli(kwas mlekowy)], stanowiące ekologiczną alternatywę dla polimerów syntetycznych otrzymywanych z ropy naftowej [94][95][96][97][98][99][100][101][102][103][104][105][106][107]. Praktyczne ich zastosowanie jest zależne od właściwości użytkowych, w tym przede wszystkim zdolności do przetwórstwa i stabilności termicznej.…”

“…Praktyczne ich zastosowanie jest zależne od właściwości użytkowych, w tym przede wszystkim zdolności do przetwórstwa i stabilności termicznej. W publikacji Worzakowskiej [102] analizowano termooksydacyjny rozkład dwóch kopolimerów skrobi szczepionych nowymi monomerami (met)akrylanowymi -pochodnymi alkoholu terpenowego (cytronelolu). Rozkład kopolimerów i produkty gazowe badano metodą analizy TG/DTG/DSC, FTIR.…”

Synthesis of luminescent polymers in the UV light region from dimethacrylate monomer using novel quinoline dyes

“…Simultaneous thermogravimetry‐differential thermal analysis (TG‐DTA) and differential scanning calorimetry (DSC) are widely used to study thermal properties such as thermal polymerization, glass transition, thermal stability, and degradation steps . Mid‐infrared spectroscopy (MIR) has been used to indicate the degree of conversion and rate of polymerization in the photopolymerization process when using different photoinitiators .…”

“…Simultaneous thermogravimetry-differential thermal analysis (TG-DTA) and differential scanning calorimetry (DSC) are widely used to study thermal properties such as thermal polymerization, glass transition, thermal stability, and degradation steps. 7,10,15,16 Midinfrared spectroscopy (MIR) has been used to indicate the degree of conversion and rate of polymerization in the photopolymerization process when using different photoinitiators. [6][7][8][9][10][11][12] The morphological characteristics of polymers are widely analyzed by scanning electron microscope (SEM), [17][18][19] and solid UV-vis analysis is used to determine optical band gap and modifications in absorption bands.…”

Thermal studies on the starch-g-copolymers prepared from two terpene acrylate monomers under oxidative conditions

“…Starch/lactic acid graft copolymers [20][21][22], maleated thermoplastic starch-gpolylactic acid [23], esterified maleic anhydride starch-gpolylactic acid [24], hydroxyethyl starch-grafted-polylactide [25], starch-g-poly(vinyl alcohol) [26], starch-gpoly(n-vinylimidazole) [27], carboxymethyl starch-gpoly(N-vinylimidazole) [28,29] copolymers have been precisely studied. In addition, the copolymers received from potato starch and aromatic type meth(acrylate) monomers [30][31][32][33][34][35][36] and more, environmentally-friendly starch-g-poly(citronellyl acrylate) [37] and starch-gpoly(citronellyl methacrylate) copolymers [38,39] under the free radical copolymerization have been presented.…”