Kinetics of thermal degradation of poly(ε-caprolactone)

Sivalingam, G.; Karthik, R.; Madras, Giridhar

doi:10.1016/s0165-2370(03)00045-7

Cited by 106 publications

(82 citation statements)

References 11 publications

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“…The results showed that the copolymer has a higher peak degradation temperature compared to the GAP pure polymer. This finding is inconsistent with the findings of Sivalingam et al who studied the pyrolysis mass analysis of pure PCL [11]. Furthermore, the copolymer decomposed in two stages around 280 °C and 440 °C.…”

Section: Tg Dsc Dtg and Activation Energycontrasting

confidence: 90%

Synthesis and Kinetic Study of PCL-GAP-PCL Tri-block Copolymer

Chizari

Bayat

2018

Cent. Eur. J. Energ. Mater.

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An energetic tri-block copolymer PCL-GAP-PCL (Mn = 1794) was synthesized by a ring-opening polymerization of ε-caprolactone with glycidyl azide polymer (GAP) of low molecular weight (Mn = 1006 g/mol) as initiator, in the presence of dibutyltin dilaurate (DBTDL) as catalyst, at 100 °C in the absence of solvent. The products obtained in high yield were characterized by FTIR, gel permeation chromatography (GPC), and 1 H and 13 C NMR spectroscopy. Thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) were used to study the thermal behaviour of the polymers. An advanced isoconversional method has been applied for kinetic analysis. The activation energy, calculated by the Flynn-Wall-Ozawa (FWO) and Kissinger methods, and thermal analysis revealed that the tri-block copolymer has greater thermal stability than homopolymer GAP. The results of the activation energies from the Kissinger method for the first and second steps were 180.3 kJ·mol −1 and 209.8 kJ·mol, respectively. Furthermore, for the copolymer, the activation energy versus the level of conversion was calculated by the FWO method. The glass transition temperature (Tg) for GAP was influenced by the PCL blocks; as a result the copolymer (Tg = −64 °C) showed better thermal properties than homopolymer GAP (Tg = −48 °C).

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Section: Tg Dsc Dtg and Activation Energycontrasting

confidence: 90%

Synthesis and Kinetic Study of PCL-GAP-PCL Tri-block Copolymer

Chizari

Bayat

2018

Cent. Eur. J. Energ. Mater.

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“…Several groups investigated the thermal stability of PCL in the high temperature region by using various analytical techniques, although there is no consistency in the mechanism. [57][58][59][60][61][62] We also prepared PCL (M n ¼ 113 000, M w =M n ¼ 1.6) by a ring-opening polymerization of e-CL in the presence of Zn(CH 2 CH 3 ) 2 /H 2 O catalyst. [62] Figure 12 shows the TGA and DTG curves of purified PCL at a heating rate of 10 8C Á min À1 under nitrogen atmosphere.…”

Section: Thermal Degradation Processes Of Poly(e-caprolactone)mentioning

confidence: 99%

Thermal Degradation of Environmentally Degradable Poly(hydroxyalkanoic acid)s

Abe

2006

Macromolecular Bioscience

104

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Aliphatic polyesters have attracted industrial attention as environmentally degradable thermoplastics to be used for a wide range of applications. Besides intensive studies on the biodegradability of aliphatic polyesters, understanding of the thermal stability has importance for processing, application, and recycling. The details of thermal degradation processes of five types of aliphatic polyesters; namely, poly(L-lactide), poly(3-hydroxybutyric acid), poly(4-hydroxybutyric acid), poly(delta-valerolactone), and poly(epsilon-caprolactone), were investigated by means of several thermoanalytical techniques under both isothermal and non-isothermal conditions. In this feature article, the thermal degradation behaviors of aliphatic polyesters with different numbers of carbon atoms in the main chain of the monomeric unit are reviewed. In addition, the effects of chain-end structure and residual metal compounds on the thermal degradation processes of aliphatic polyesters consisting of hydroxyalkanoic acid monomeric units are presented. Schemes of thermal degradation reaction of poly(hydroxyalkanoic acid)s.

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“…11 PCL degrades in a single stage, around 385°C, with simultaneous random scission and depolymerization from the chain end by specific chain scission. 16 Because of the structural similarity of PVAC to PVC, PVAC degrades in two stages involving deacetylation (ϳ 328°C) followed by the structural disintegration of polyolefinic backbone (ϳ 450°C). 1,17,18 Because of such interesting properties of PCL/PVAC blends, the thermal degradation of ternary blends formed by the addition of PVC to PCL/ PVAC binary blends was investigated in an inert flowing nitrogen atmosphere under dynamic heating and compared with the degradation of binary blends.…”

Section: Introductionmentioning

confidence: 99%

Thermal degradation of ternary blends of poly(ε‐caprolactone)/poly(vinyl acetate)/poly(vinyl chloride)

Sivalingam

Madras

2004

J of Applied Polymer Sci

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ABSTRACT:The thermal degradation of ternary blends of poly(-caprolactone) (PCL), poly(vinyl acetate) (PVAC), and poly(vinyl chloride) (PVC) was studied using a thermogravimetry analyzer under dynamic heating in flowing nitrogen atmosphere. PCL degraded in a single stage, whereas the PVAC and PVC degraded in two stages during which acid is released in the first stage followed by backbone breakage in the second stage. The addition of PVC to either PCL or PVAC affected the thermal stability of the blend, whereas the addition of PVAC to PCL did not alter the thermal stability of the blend. In ternary blends, the addition of PVC affected the degradation of PVAC but did not influence the degradation of PCL in the range investigated. The increased addition of PCL to the binary blends of PVC/ PVAC decreased the extent of thermal instability of PVAC because of the addition of PVC. The addition of even 10% PVAC to the PCL/PVC blend removed the thermal instability of PCL resulting from the addition of PVC and can be attributed to the ease of chlorine or hydrogen chloride capture of PVAC over PCL.

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Kinetics of thermal degradation of poly(ε-caprolactone)

Cited by 106 publications

References 11 publications

Synthesis and Kinetic Study of PCL-GAP-PCL Tri-block Copolymer

Synthesis and Kinetic Study of PCL-GAP-PCL Tri-block Copolymer

Thermal Degradation of Environmentally Degradable Poly(hydroxyalkanoic acid)s

Thermal degradation of ternary blends of poly(ε‐caprolactone)/poly(vinyl acetate)/poly(vinyl chloride)

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