Cationic copolymerization of cycloaliphatic epoxy resin with an spirobislactone with lanthanum triflate as initiator Kinetics of the curing process

被引:17
作者
Fernandez, X [1 ]
Ramis, X [1 ]
Salla, JM [1 ]
机构
[1] Univ Politecn Catalunya, Lab Termodinamica, ETSEIB, E-08028 Barcelona, Spain
关键词
epoxy resin; lactone; isoconversional methods; DSC; kinetic model;
D O I
10.1016/j.tca.2005.07.012
中图分类号
O414.1 [热力学];
学科分类号
摘要
3,4-Epoxycyclohexylmethyl 3,4-epoxycyclohexane carboxylate (ECH) was cured with different proportions of 1,6-dioxaspiro[4,4]nonane-2,7-dione (s(gamma-BL)) using lanthanum triflate as a catalyst. DSC was used to obtain kinetic data associated to the curing process by means of series of non-isothermal experiments. Fourier transform infrared spectroscopy in attenuated total reflection mode (FT-IR/ATR) was used to study the evolution of the epoxide group in order to compare experimental isothermal data with simulated isothermal data. The complexity of the process itself enabled us to compare different procedures for obtaining isoconversional data and to determine the kinetic model that best describes the curing process. An increase in the proportion of s(gamma-BL) increases the speed of the curing process. By means of applying isoconversional methods to dynamic experimental data, we observed that an increase in the proportion of s(gamma-BL) leads to an overall decrease in the activation energy for the different formulations. Kinetic parameters that were determined using both differential and integral isoconversional procedures were compared. This allowed us to analyze and to discuss the usefulness of different methods in order to obtain a suitable kinetic triplet at each step of the curing of the ECH/s(gamma-BL) system using lanthanum triflate as a catalyst. (C) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:144 / 154
页数:11
相关论文
共 29 条
[11]   Influence of lanthanide triflate compounds on formation of networks from DGEBA and γ-butyrolactone [J].
Mas, C ;
Mantecón, A ;
Serra, A ;
Ramis, X ;
Salla, JM .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2004, 42 (15) :3782-3791
[12]  
Matejka L, 1997, J POLYM SCI POL CHEM, V35, P665, DOI 10.1002/(SICI)1099-0518(199703)35:4<665::AID-POLA8>3.0.CO
[13]  
2-O
[14]  
Murray P, 1955, Trans Br Ceram Soc, V54, P204
[15]   A NEW METHOD OF ANALYZING THERMOGRAVIMETRIC DATA [J].
OZAWA, T .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1965, 38 (11) :1881-+
[16]   Kinetic study by FTIR, TMA, and DSC of the curing of a mixture of DGEBA resin and γ-butyrolactone catalyzed by ytterbium triflate [J].
Ramis, X ;
Salla, JM ;
Mas, C ;
Mantecón, A ;
Serra, A .
JOURNAL OF APPLIED POLYMER SCIENCE, 2004, 92 (01) :381-393
[17]   Simulation of isothermal cure of a powder coating - Non-isothermal DSC experiments [J].
Ramis, X ;
Salla, JM ;
Cadenato, A ;
Morancho, JM .
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2003, 72 (02) :707-718
[18]   Curing of a thermosetting powder coating by means of DMTA, TMA and DSC [J].
Ramis, X ;
Cadenato, A ;
Morancho, JM ;
Salla, JM .
POLYMER, 2003, 44 (07) :2067-2079
[19]  
RONGHSIEN L, 2001, J APPL POLYM SCI, V82, P3539
[20]  
Sadhir R. K., 1992, EXPANDING MONOMERS S