scholarly journals Heat Curing Behavior of Light-cured Composite Resins Investigated by Dynamic Differential Scanning Calorimetry

1990 ◽  
Vol 9 (2) ◽  
pp. 153-162,228 ◽  
Author(s):  
Seiji BAN ◽  
Yosifumi TAKAHASHI ◽  
Hiroaki TANASE ◽  
Jiro HASEGAWA
Keyword(s):  
Differential Scanning Calorimetry ◽  
Composite Resins ◽  
Scanning Calorimetry ◽  
Curing Behavior ◽  
Heat Curing

Curing behavior of a novolac-type phenolic resin analyzed by differential scanning calorimetry

2003 ◽  
Vol 90 (6) ◽  
pp. 1678-1682 ◽  
Author(s):  
Eliton S. De Medeiros ◽  
Jos� A. M. Agnelli ◽  
Kuruvilla Joseph ◽  
Laura H. De Carvalho ◽  
Luiz H. C. Mattoso
Keyword(s):  
Differential Scanning Calorimetry ◽  
Phenolic Resin ◽  
Scanning Calorimetry ◽  
Curing Behavior

Curing Mechanism Study for Dual Cure of Epoxy Adhesive by Differential Scanning Calorimetry

2016 ◽  
Vol 864 ◽  
pp. 3-7
Author(s):  
Waefatimah Waenawae ◽  
Santi Pumkrachang ◽  
Syahril bin Zainudin ◽  
Thammasit Vongsetskul ◽  
Tanakorn Osotchan
Keyword(s):  
Differential Scanning Calorimetry ◽  
Uv Light ◽  
Heating Time ◽  
Epoxy Adhesive ◽  
Curing Process ◽  
Mechanism Study ◽  
Scanning Calorimetry ◽  
Heat Curing ◽  
Heat Cure ◽  
Curing Mechanism

Epoxy adhesive used in electronic packaging could normally be cured by ultraviolet light, heat at high temperature or dual cured by both processes. Differential scanning calorimetry (DSC) has been used to identify and analyze the occurred reaction during the curing process. The structural modification of epoxy during curing could be examined by measuring its thermal properties, and the change in molecular structure of epoxy could be observed by a relative small area of DSC peak. This provided the heat amount required for complete cure. It is found that the DSC peak area after heat cure at 90 °C increased linearly as a function of heating time while that at 120 °C decreased exponentially. For UV cure, it indicated that the curing mechanism was strongly depend on the energy from UV light. For dual cure at 90 °C, the heat curing time could be reduced from single curing process of 50 minutes to 6 minutes, while the heating time for dual cure at 120 °C could be reduced from 4 minutes to 2 minutes.

scholarly journals Flexible Nanocomposites Based on Polydimethylsiloxane Matrices with DNA-Modified Graphene Filler: Curing Behavior by Differential Scanning Calorimetry

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2301 ◽  
Author(s):  
Elisa Toto ◽  
Susanna Laurenzi ◽  
Maria Gabriella Santonicola
Keyword(s):  
Differential Scanning Calorimetry ◽  
Deoxyribonucleic Acid ◽  
Isoconversional Methods ◽  
Activation Energies ◽  
Scanning Calorimetry ◽  
Curing Behavior ◽  
Model Free ◽  
Lower Viscosity ◽  
Modified Graphene

Novel silicone-based nanocomposites with varied elastic properties were prepared by blending standard polydimethylsiloxane (PDMS) with a lower viscosity component (hydroxyl-terminated PDMS) and integrating a graphene nanoplatelets (GNP) filler modified by strands of deoxyribonucleic acid (DNA). The curing behavior of these nanocomposites was studied by dynamic and isothermal differential scanning calorimetry. The activation energies of the polymerization reactions were determined using the Kissinger method and two model-free isoconversional approaches, the Ozawa–Flynn–Wall and the Kissinger–Akahira–Sunose methods. Results show that the complex trend of the curing behavior can be described using the isoconversional methods, unveiling lower activation energies for the nanocomposites with standard PDMS matrices. The role of the DNA modification of graphene on the curing behavior is also demonstrated. The curing reactions of the nanocomposites with the PDMS matrix are favored by the presence of the GNP–DNA filler. PDMS/PDMS–OH blends generate softer nanocomposites with hardness and reduced elastic modulus that can be tuned by varying the amount of the filler.

Curing behavior of epoxy resin/tung oil anhydride exfoliated nanocomposite by differential scanning calorimetry

2004 ◽  
Vol 92 (6) ◽  
pp. 3822-3829 ◽  
Author(s):  
Suping Bao ◽  
Shijun Shen ◽  
Guodong Liang ◽  
Hongbo Zhai ◽  
Weibing Xu ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Epoxy Resin ◽  
Scanning Calorimetry ◽  
Curing Behavior ◽  
Tung Oil ◽  
Exfoliated Nanocomposite
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