排序方式: 共有4条查询结果,搜索用时 62 毫秒
1
1.
2.
D. Samios S. Castiglia N. Pesce Da Silveira H. Stassen 《Journal of Polymer Science.Polymer Physics》1995,33(13):1857-1866
The network formation process of the triethylamine-initiated reaction of 1,4-butanediol diglycidyl ether with cis-1,2-cyclohexanedicarboxylic anhydride has been investigated by conventional differential scanning calorimetry and temperature scanning Brillouin light scattering as a new experimental method for the estimation of the reaction's conversion factor. The time-temperature evolution of the observed quantities (reaction enthalpy in the calorimetric measurements and hypersound velocity in the light scattering) reflects in both sets of experimental data, but results in different kinetic parameters obtained by the assumption of an Arrhenius behavior. These differences are ascribed to the relation of the observed properties with respect to the evolution of the reaction. The enthalpy production of the system observed in the calorimetric experiment is shown to be connected directly to the chemical reaction, whereas the change in the hypersound velocity measured by the light scattering method is sensitive to the solidification of the system. © 1995 John Wiley & Sons, Inc. 相似文献
3.
4.
S. R. V. Castiglia D. Fioretto L. Verdini D. Samios 《Journal of Polymer Science.Polymer Physics》2001,39(12):1326-1336
The reaction of 1,4‐butanediol diglycidyl ether (EP) with cis‐1,2‐cyclohexanedicarboxylic anhydride (CH) and triethylamine (TEA) as an initiator was studied with temperature scanning Brillouin spectroscopy (TSBS) and differential scanning calorimetry (DSC). The evolution of the reaction process (liquid–gel–solid) was investigated as a function of the epoxy molar fraction (xEP), for sample compositions varying from an epoxy excess to an anhydride excess. The dependence of the final conversion factors αrDSC and αrTSBS and the kinetic parameters EDSC and ETSBS on xEP is presented. A comparison of the experimental gelation point (Pgel) behavior and the expected theoretical one, described by the Flory theory, is also reported. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 1326–1336, 2001 相似文献
1