Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Martin C. Hawley"'
Publikováno v:
International Journal of Applied Electromagnetics and Mechanics. 30:9-28
This paper presents a self-consistent 3D marching-in-time multiphysics model, which includes electromagnetic field distribution, microwave power absorption, heat transfer, and polymer curing kinetics. Temperature- and cure-dependent permittivity and
Publikováno v:
Journal of Thermoplastic Composite Materials. 22:249-257
The dielectric behavior of a curing system of diglycidyl ether of bisphenol A and m-phenylenediamine has been studied over the temperature range of 20—100°C under 2.45 GHz microwave radiation. The dielectric constant and the dielectric loss factor
Publikováno v:
Composites Part A: Applied Science and Manufacturing. 39:1632-1637
Experiments have been performed to further the development of natural fiber reinforced composites as a replacement for glass fiber composites. Untreated and treated surfaces of natural fibers were characterized using FTIR, XPS, and ESEM. Changes in t
Autor:
Nikki Sgriccia, Martin C. Hawley
Publikováno v:
Composites Science and Technology. 67:1986-1991
Experiments to investigate the effectiveness of microwave curing of natural fiber reinforced composites have been performed. Hemp, flax, kenaf, henequen and glass (15 wt.%) reinforced epoxy composed of diglycidyl ether of bisphenol-A (DGEBA) and diam
Publikováno v:
Polymer Engineering & Science. 45:1576-1580
The dielectric properties of a curing diglycidyl ether of bisphenol A (DGEBA)/Jeffamine D-230 system have been studied over the temperature range of 20–90°C at 2.45 GHz. It was found that, generally, both the dielectric constant and the dielectric
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 42:2871-2877
The dielectric properties of a curing epoxy/amine system have been studied from 25 to 120 °C at 2.45 GHz. The epoxy resins at different extents of curing exhibit a γ relaxation, which can be described by the Arrhenius rate law. The relaxation is at
A study of microwave reaction rate enhancement effect in adhesive bonding of polymers and composites
Autor:
Martin C. Hawley, Shuangjie Zhou
Publikováno v:
Composite Structures. 61:303-309
Microwaves have been investigated as an efficient alternative energy source for polymers and composites processing. In this paper, microwaves are applied in bonding two polymer composites with an epoxy-based adhesive. Results were compared with therm
Publikováno v:
Chemical Engineering Science. 58:4271-4285
In the current work, the process of 2,4-PD hydrogenolysis is studied in a combined effort of experiments and computer simulation, to understand the mechanism and factors controlling the C–C vs. C–O bond cleavage selectivity of this process. It is
Publikováno v:
Industrial & Engineering Chemistry Research. 42:2913-2923
This paper presents a new approach to the production of 1,3-propanediol from glycerol via selective dehydroxylation. The idea is to selectively transform the middle hydroxyl group of glycerol into a tosyloxyl group and then remove the transformed gro
Autor:
Lawrence T. Drzal, Krishnamurthy Jayaraman, Martin C. Hawley, B Moore, Jon Sticklen, Roy L. McCullough
Publikováno v:
Composites Part A: Applied Science and Manufacturing. 32:1175-1179
The objectives of the National Science Foundation (NSF) State of Michigan/Industry/University Cooperative Research Center on low-cost, high-speed polymer composites processing at Michigan State University (MSU) are design, development and deployment