The Compatibilizing Effect of Diglycidyl Ether of Bisphenol a (DGEBA) Epoxy Resin on the Blends of Nylon-6 and Core-Shell Impact Modifier and Its Toughening Mechanism
The result showed that when n(epoxy group)∶n(acrydic acid)∶n(succinic anhydride)=1∶0.5∶0.5,the product shows good photosensitivity and adhesion and could dissolve in 5%(m/m) Na2CO3 aqueous solution.
When the content of nano-TiO_2 is 3%,the bending and tensile strength of the TiO_2/epoxy composites can be 72% and 65% higher than that without nano-TiO_2 particles.
Reaction mechanisms involved in two-step Synthesis of low-molec-ular weight bispenol A type epoxy resin are discussed. Appronches to lower molar ratio of epichlorohydrin to bisphenol A in the synthesis are indicated.
The addition of the fillers could improve the dielectrical properties and some mechanical properties but showed no influence to the fracture toughness of the toughened epoxy resin.
The copolymer structure containing epoxy groups was demonstrated from the 1H nuclear magnetic resonance (1H NMR) spectrum.
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Bisphenol-A epoxy resin reinforced and toughened by hyperbranched epoxy resin
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The study on toughening and reinforcing of bisphenol-A epoxy resin is one of important developmental direction in the field.
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This paper reports a one-pot synthesis of aromatic polyester hyperbranched epoxy resin HTDE-2, an effect of HTDE-2 content on the mechanical and thermal performance of the bisphenol-A (E51)/HTDE-2 hybrid resin in detail.
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TTT diagram and phase structure control of 2/4 functional epoxy blends used in advanced composites
Two epoxylated novolacs based on phenol-formaldehyde and resorcinol-formaldehyde condensation products respectively were synthesized. Both of them contained more than two epoxy groups per molecule. After curing with various curing agents, the deformation under constant load and the weight loss at elevated temperatures of the cured resin were measured. It was proved that with an increase in the number of functionality present in the resin, the degree of cross linking was increased. As a consequen...
The curing process of epoxy resin with maleic anhydride has been examined with infrared spectroscopy, by following the functional group changes occuring in different curing stages at different temperatures. It has been found that the increase of molecular weight and the formation of cross-linkages in the epoxy resin are attained primarily via the esterification reaction, that is, the anhydride first reacts with the hydroxyl group in the resin to form a mono-ester and the newly formed carboxylic ...
The dynamic mechanical properties of epoxy resins cured with maleic anhydride have been studied over the 25-250℃ temperature region using a vibrating reed method. The temperature dependence of Young's modulus and the internal friction for the cured epoxy resin is typical for a slightly crosslinked polymer. A pronounced dispersion rigion is noted near 150℃ (which varies with the degree of cure), and is accompained by a prominent drop in Young's modulus in this region. The loss peak is due to the ...