Castor-oil-modified epoxy resins as model systems of rubber-modified thermosets. 1: Thermodynamic analysis of the phase separation

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

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A Study on the Blends of Epoxy/Polybutadiene and the Application to the Encapsulation of a Capacitor

MRS Proceedings ◽

10.1557/proc-274-25 ◽

1992 ◽

Vol 274 ◽

Author(s):

Zhongyuan Ren ◽

Liying Qui

Keyword(s):

Phase Separation ◽

Dynamic Mechanical Analysis ◽

Low Temperatures ◽

Epoxy Resins ◽

Mechanical Analysis ◽

Dynamic Mechanical

ABSTRACTThis paper describes the blends of epoxy/polybutadiene and the application of the blends to the encapsulation of capacitors. Experiments showed that the hydroxy-carboxyl terminated polybutadiene (HCTPB) had a good toughening effect on epoxy resins, and the blends of epoxy/HTPB or epoxy/HCTPB had good craze resistance at low temperatures. The phase separation and dynamic mechanical analysis of these blends are discussed below.

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Thermal Stabilities and the Thermal Degradation Kinetics Study of the Flame Retardant Epoxy Resins

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1053.263 ◽

2014 ◽

Vol 1053 ◽

pp. 263-267 ◽

Cited By ~ 1

Author(s):

Xiu Juan Tian

Keyword(s):

Thermal Stability ◽

Thermal Degradation ◽

Flame Retardant ◽

Epoxy Resin ◽

Epoxy Resins ◽

Degradation Kinetics ◽

Thermal Degradation Kinetics ◽

Thermal Stabilities ◽

Degradation Kinetic ◽

Modified Epoxy

Thermal stability and thermal degradation kinetics of epoxy resins with 2-(Diphenylphosphinyl)-1, 4-benzenediol were investegated by thermogravimetric analysis (TGA) at different heating rates of 5 K/min, 10 K/min, 20 K/min and 40 K/min. The thermal degradation kinetic mechanism and models of the modified epoxy resins were determined by Coast Redfern method.The results showed that epoxy resins modified with the flame retardant had more thermal stability than pure epoxy resin. The solid-state decomposition mechanism of epoxy resin and the modified epoxy resin corresponded to the controlled decelerating ځ˽̈́˰̵̳͂͆ͅ˼˰̴̱̾˰̸̵̈́˰̵̸̳̱̹̽̾̓̽˰̶̳̹̾̈́̿̾̓ͅ˰̶˸ځ˹˰̵̵͇͂˰̃˸́˽ځ˹2/3. The introduction of phosphorus-containing flame retardant reduced thermal degradation rate of epoxy resins in the primary stage, and promote the formation of carbon layer.

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