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Anongnat Somwangthanaroj. Preparation and characterization of sequential curing with off-stoichiometric amine-diglycidyl ether of bisphenol A/novolac epoxy blended systems. (). King Mongkut's University of Technology North Bangkok. Central Library. : , 2021.
Preparation and characterization of sequential curing with off-stoichiometric amine-diglycidyl ether of bisphenol A/novolac epoxy blended systems
Name: Pakawat Suttithama
Organization :
Chulalongkorn University. Faculty of Engineering
Email :
6270199121@student.chula.ac.th
Name: Anongnat Somwangthanaroj
Organization :
Chulalongkorn University. Faculty of Engineering
Email :
banongnat.s@chula.ac.th
LCSH:
Epoxy resins
LCSH:
Amines
LCSH:
Stoichiometry
Abstract:
B-staged epoxy adhesives are partially cured (10-20% degree of cure). From this
stage, it can be stored at ambient or refrigerated temperature for longer shelf life. At later
time, the fully cured adhesive can be achieved with proper temperature. B-staged epoxy
adhesives are used in many applications such as electronic devices and prepreg composites.
The most common available form is in the film form, rolls, sheets, or custom preforms. In
this work, B-staged epoxy blends of diglycidyl ether of bisphenol A (DGEBA) and Novolac
epoxy were prepared by using sequential curing with off-stoichiometric amine technique.
Diethylenetriamine (DETA) was used as the curing agent for the first curing step. While
dicyandiamide (DICY) was used as the curing agent for the second curing step and 3-(3,4-
dichlorophenyl)-1,1dimethylurea (DIURON) as accelerator for reducing the curing
temperature of DICY. The DGEBA/Novolac weight ratio used were 100/0, 80/20 and
70/30. The glass transition temperature (Tg) of epoxy blends investigated via non-isothermal
differential scanning calorimetry (DSC) were improved with increasing Novolac content.
However, blending more than 30% of Novolac was practically difficult to proceed due to
high viscosity, which is not suitable for film casting process at room temperature. Therefore,
the weight ratio 70/30 of DGEBA/Novolac blend was then selected for further
investigation to study its curing behavior owing to its high Tg of 144 °C and suitable for use
in film casting process at room temperature.
King Mongkut's University of Technology North Bangkok. Central Library
Address:
BANGKOK
Email:
library@kmutnb.ac.th
Created:
2021
Modified:
2026-01-26
Issued:
2026-01-26
บทความ/Article
application/pdf
BibliograpyCitation :
In Thai Institute of Chemical Engineering and Applied Chemistry. The 30th Thai Institute of Chemical Engineering and Applied Chemistry Conference (TIChE 2021) (BIM14). Nakhon Ratchasima : Suranaree University of Technology
eng
©copyrights King Mongkut's University of Technology North Bangkok
RightsAccess:
ใช้เวลา
0.028611 วินาที
Pakawat Suttithama
| Title | Contributor | Type |
|---|---|---|
| Preparation and characterization of sequential curing with off-stoichiometric amine-diglycidyl ether of bisphenol A/novolac epoxy blended systems
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Pakawat Suttithama;Anongnat Somwangthanaroj | บทความ/Article |
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