Thermal degradation and isoconversional kinetic analysis of light-cured dimethacrylate copolymers

被引：18

作者：

Achilias, Dimitris S. ^{[1
]}

Karabela, Maria M. ^{[1
]}

Sideridou, Irini D. ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Dept Chem, Lab Organ Chem Technol, Thessaloniki 54124, Greece

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2010年 / 99卷 / 03期

关键词：

Activation energy; Dimethacrylate copolymers; Thermal degradation; Thermogravimetric analysis; FREE-RADICAL POLYMERIZATION; DENTAL RESINS; ACTIVATION-ENERGY; THERMOOXIDATIVE DEGRADATION; BIS-GMA/TEGDMA; POLYMERS; COMPOSITES; DECOMPOSITION; MONOMERS; SYSTEM;

D O I：

10.1007/s10973-009-0526-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Thermal degradation kinetics of copolymers based on bis-phenol A ethoxylated dimethacrylate (Bis-EMA) with triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA) with TEGDMA in wt/wt ratios 30/70, 50/50, or 70/30 were investigated using thermogravimetric analysis as a means to provide specific information regarding the internal structures of these resins. Thermogravimetric scans were taken at four different heating rates to perform an isoconversional analysis to determine the change of the effective activation energy as a function of conversion. A two-step degradation mechanism was found to occur in almost all copolymer compositions attributed to the existence of inhomogeneities in the macromolecular structure and the formation of weak links inside the polymeric network.

引用

页码：917 / 923

页数：7

共 31 条

[1] Thermal degradation of light-cured dimethacrylate resins - Part I. Isoconversional kinetic analysis [J].

Achilias, Dimitris S. ;

Karabela, Maria M. ;

Sideridou, Irini D. .

THERMOCHIMICA ACTA, 2008, 472 (1-2) :74-83

[2] Kinetics of the benzoyl peroxide/amine initiated free-radical polymerization of dental dimethacrylate monomers: Experimental studies and mathematical modeling for TEGDMA and bis-EMA [J].

Achilias, DS ;

Sideridou, ID .

MACROMOLECULES, 2004, 37 (11) :4254-4265

[3] Kinetics of the complex process of thermo-oxidative degradation of poly(vinyl alcohol) [J].

Budrugeac, P. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2008, 92 (01) :291-296

[4] Comparative kinetic study of the non-isothermal thermal curing of bis-GMA/TEGDMA systems [J].

Cadenato, A. ;

Morancho, J. M. ;

Fernandez-Francos, X. ;

Salla, J. M. ;

Ramis, X. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2007, 89 (01) :233-244

[5] Thermal degradation kinetics of the biodegradable aliphatic polyester, poly(propylene succinate) [J].

Chrissafis, K ;

Paraskevopoulos, KM ;

Bikiaris, DN .

POLYMER DEGRADATION AND STABILITY, 2006, 91 (01) :60-68

[6]

Chrissafis K, 2009, J THERM ANAL CALORIM, V95, P273, DOI 10.1007/s10973-008-9041-z

[7] GENERAL TREATMENT OF THERMOGRAVIMETRY OF POLYMERS [J].

FLYNN, JH ;

WALL, LA .

JOURNAL OF RESEARCH OF THE NATIONAL BUREAU OF STANDARDS SECTION A-PHYSICS AND CHEMISTRY, 1966, A 70 (06) :487-+

[8]

Friedman H.L., 1964, Journal of Polymer Science Part C: Polymer Symposia, V6, P183, DOI DOI 10.1002/POLC.5070060121

[9] Kinetic analysis of pyrolysis of cross-linked polymers [J].

Lefebvre, J ;

Mamleev, V ;

Le Bras, M ;

Bourbigot, S .

POLYMER DEGRADATION AND STABILITY, 2005, 88 (01) :85-91

[10] Thermal analysis of dental resins cured with blue light-emitting diodes (LEDs) [J].

Nomura, Y ;

Teshima, W ;

Tanaka, N ;

Yoshida, Y ;

Nahara, Y ;

Okazaki, M .

JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, 2002, 63 (02) :209-213

← 1 2 3 4 →