Thermogravimetric analysis of poly(ε-caprolactam) and poly[(ε-caprolactam)- co -(ε-caprolactone)] polymers

Draye, Anne-Cécile; Persenaire, Olivier; Brožek, Jiřı́; Roda, Jan; Košek, T.; Dubois, Philippe

doi:10.1016/s0032-3861(01)00352-4

Cited by 52 publications

(28 citation statements)

References 11 publications

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“…Taking all this data into account, it can be concluded that anionic polymerization initiated by CLAMgBr in presence of PCLO, as well as CLO, yields -after one-hour propagation at 150 8C -an essentially random copolymer, though a certain indication of short blocks can be seen from our thermal measurements [10]. This was confirmed also by an analysis of the NMR spectra [5], showing a certain deviation from random statistics (Table 4).…”

Section: Polymerization Initiated By Clamgbr and Activated By N-acyllsupporting

confidence: 72%

“…Thermal properties of P(CLA-co-CLO) (prepared with CLAMgBr as initiator) were investigated by HiRese TGA and the degradation products identified by FTIR and mass spectroscopy [10]. The TGA measurements have suggested that the mechanism of the degradation of poly(1-caprolactam) involves both an 'unzipping' depolymerization leading to the formation of 1-caprolactam and random chain scission through the amide group pyrolysis.…”

Section: ð5þmentioning

confidence: 99%

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Polymerization of lactams, 95 Preparation of polyesteramides by the anionic polymerization of ε-caprolactam in the presence of poly(ε-caprolactone)

Bernášková

Chromcová

Brožek

et al. 2004

Polymer

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Section: Polymerization Initiated By Clamgbr and Activated By N-acyllsupporting

confidence: 72%

Section: ð5þmentioning

confidence: 99%

Polymerization of lactams, 95 Preparation of polyesteramides by the anionic polymerization of ε-caprolactam in the presence of poly(ε-caprolactone)

Bernášková

Chromcová

Brožek

et al. 2004

Polymer

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“…Pyrolysis promotes chain cleavages randomly distributed along the chain and when two pyrolysis reactions occur with ester functions, one of the reaction products is 5-hexenoic acid 23,27,28 .…”

Section: Thermal Analysismentioning

confidence: 99%

Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR

et al. 2012

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Poly (ε-caprolactone) (PCL) based hybrids containing different amounts of modified (Aerosil ® R972) and unmodified (Aerosil ® A200) silica oxide were prepared employing the solution method, using chloroform. The relationships of the amount of nanofillers, organic coating, molecular structure and intermolecular interaction of the hybrid materials were investigated mainly using low-field nuclear magnetic resonance (NMR). The NMR analyses involved the hydrogen spin-lattice relaxation time (T 1 H) and hydrogen spin-lattice relaxation time in the rotating frame (T 1 ρH). The spin-lattice relaxation time measurements revealed that the PCL/silica oxide hybrids were heterogeneous, meaning their components were well dispersed. X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were also employed. The DSC data showed that all the materials had lower crystallization temperature (Tc) and melting temperature (Tm), so the crystallinity degree of the PCL decreased in the hybrids. The TGA analysis demonstrated that the addition of modified and unmodified silica oxide does not cause considerable changes to PCL's thermal stability, since no significant variations in the maximum temperature (Tmax) were observed in relation to the neat polymer.

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“…In figure 7(a) scheme for thermal fragmentation of the complexes is presented. The entire fragmentation process seems to be proceeded by successive methylene-group loss (160-400 C), while the remaining fragmentation corresponds to the degradation of the aliphatic chain [15,16]. The residual weight at the end of the decomposition indicates the formation of the corresponding metal sulfides, MS (Zn and Cd) [17].…”

Section: Thermal Analysismentioning

confidence: 99%

Synthesis and thermal properties of IIB group derived ϵ-caprolactam-3-dithiocarboxylic acid complexes

Íñiguez

Pastor-Medrano

Ureña-Núñez

et al. 2007

Journal of Coordination Chemistry

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Zn(II), Cd(II) and Hg(II) "-caprolactam-3-dithiocarboxylic acid complexes were synthesized by reacting the "-caprolactam-3-carbothioic sodium salt with the respective metal salt. Samples were characterized by X-ray powder diffraction, EDS elemental analysis, UV-visible, FT-IR, 1 H NMR and EPR spectroscopy. Thermal properties were determined using thermogravimetry and differential scanning calorimetric analysis. M-"-caprolactam-3-dithiocarboxylic acid complexes showed intense electronic delocalization due to the charge transfer (420 nm) induced from the metal to the dithiolate group reaching different stages into the V unit (350 nm) of the dithiocarboxylate ring with a ''n ! '' (310 nm) transition. This transition was also observed by EPR which showed 3 parallel and 3 perpendicular signals. The complexes are stabilized by the electro-attraction of the amidic and carbonyl groups; the stability trend is Zn4Cd4Hg. Thermal decomposition shows a multi-step fragmentation process that suggests lactamic chain rupture.

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Thermogravimetric analysis of poly(ε-caprolactam) and poly[(ε-caprolactam)- co -(ε-caprolactone)] polymers

Cited by 52 publications

References 11 publications

Polymerization of lactams, 95 Preparation of polyesteramides by the anionic polymerization of ε-caprolactam in the presence of poly(ε-caprolactone)

Polymerization of lactams, 95 Preparation of polyesteramides by the anionic polymerization of ε-caprolactam in the presence of poly(ε-caprolactone)

Inorganic-organic hybrids based on poly (ε-Caprolactone) and silica oxide and characterization by relaxometry applying low-field NMR

Synthesis and thermal properties of IIB group derived ϵ-caprolactam-3-dithiocarboxylic acid complexes

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