Influence of amine‐terminated additives on thermal and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) cured epoxy

2019 ◽  
Vol 137 (8) ◽  
pp. 48404 ◽  
Author(s):  
Zahra Baig ◽  
Nadia Akram ◽  
Khalid Mahmood Zia ◽  
Muhammad Saeed ◽  
Muhammad Kaleem Khosa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bisphenol A ◽  
Diglycidyl Ether ◽  
Thermal And Mechanical Properties

Effect of Cellulose Functionalization on Thermal and Mechanical Properties of Epoxy Resin

2017 ◽  
Vol 757 ◽  
pp. 62-67 ◽  
Author(s):  
Kritsanachai Leelachai ◽  
Supissara Ruksanak ◽  
Tarakol Hongkeab ◽  
Supakeat Kambutong ◽  
Raymond A. Pearson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Diglycidyl Ether ◽  
Cellulose Content ◽  
Thermal And Mechanical Properties ◽  
Chemical Surface ◽  
Pull Out ◽  
Fiber Bridging ◽  
Surface Modified ◽  
Modified Epoxy

In this study, diglycidyl ether of bisphenol A (DGEBA) cured cycloaliphatic polyamine was modified with functionalized celluloses for improved thermal and mechanical properties. Three different types of surface-modified cellulose, polyacrylamide-g-cellulose (PGC), aminopropoxysilane-g-cellulose (SGC), and carboxymethyl cellulose (CMC), were investigated and used as reinforcing agents in epoxy resins. The storage modulus of these modified epoxy systems was found to significantly increase with addition of cellulose fillers (up to 1 wt. % cellulose content). An improved fracture toughness (KIC) was also observed with increasing cellulose loading content with PGC and SGC. Among the surface-modified celluloses, epoxy modified with SGC was found to have the highest fracture toughness followed by PGC and CMC at 1.0 wt.% cellulose addition due to the chemical surface compatibility. The toughening mechanisms of the cellulose/epoxy composites, measured by scanning electron microscopy (SEM), revealed that fiber-debonding, fiber-bridging, and fiber-pull out were responsible for increased toughness.

Curing, Thermal and Mechanical Properties of Liquid Crystalline p-SBPEPB/BPAER/DDE System

2011 ◽  
Vol 239-242 ◽  
pp. 3253-3256 ◽  
Author(s):  
Li Huo ◽  
Jun Gang Gao ◽  
Yong Gang Du
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Impact Strength ◽  
Bisphenol A ◽  
Liquid Crystalline ◽  
Curing Agent ◽  
Thermal And Mechanical Properties ◽  
Component System

The curing, thermal and mechanical properties of bi-component system for bisphenol A epoxy resin (BPAER) modified by liquid crystalline Sulfonyl bis(4,1-phenylene)bis[4-(2,3-epoxypro pyloxy)benzoate] (p-SBPEPB), with 4,4'-diaminodiphenyl ether (DDE) as a curing agent, were investigated. The effect of the different liquid crystalline contents and the heating rate on curing reaction was discussed. The results show that the curing peak temperature decreases, curing rate increases, the glass transition temperature (Tg)and impact strength all increase with adding of liquid crystalline p-SBPEPB when the content is not over 8wt%.

Mechanical Properties of DGEBA/Amidoamine Blend at Non-Stoichiometric Ratios

2014 ◽  
Vol 597 ◽  
pp. 63-71
Author(s):  
Britto Satheesh ◽  
Nick Warrior ◽  
Kim Yeow Tshai
Keyword(s):  
Mechanical Properties ◽  
Fracture Surface ◽  
Bisphenol A ◽  
Small Strain ◽  
Diglycidyl Ether ◽  
Mixing Ratio ◽  
Brittle Behavior ◽  
Stoichiometric Ratios

In this paper, the effect of varying mixing ratio of Diglycidyl ether of bisphenol A (DGEBA)/aliphatic amidoamine hardener on the behavior of dynamic cure profile and mechanical properties of the resulting thermoset was investigated. Epoxy/hardener sample with a stoichiometric mixing ratio of 2:1 are tested against non-stoichiometric ratios of 3:1 and 4:1. The tensile, flexural, and hardness properties of the specimens were measured while SEM is employed to investigate the fracture surface and analyze the failure. Results showed that epoxy enriched samples (non-stoichiometric) has a much brittle behavior and the DGEBA/hardener samples tend to fail under relatively small strain.

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