𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Monitoring cure viscosity of epoxy composite

✍ Scribed by Yuji A. Tajima

Publisher
Society for Plastic Engineers
Year
1982
Tongue
English
Weight
600 KB
Volume
3
Category
Article
ISSN
0272-8397

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Viscosity is an important process variable that should be monitored and controlled to ensure the consistent and reliable production of graphite‐fiber‐reinforced composite parts by the autoclave/vacuum bag process. Unfortunately, no technique is currently known for the direct measurement of viscosity in this process. However, d.c. conductivity and a.c. phase lag appear to correlate quite well with viscosity, and either electrical property may be followed in order to indirectly monitor viscosity. As the method of measuring d.c. conductivity is so inexpensive, simple, and almost free of electrical interference compared to the method of measuring a.c. phase lag, it appears to be the method of first choice for application in an autoclave environment.

πŸ“œ SIMILAR VOLUMES

Dielectric monitoring of epoxy cure
Dielectric monitoring of epoxy cure
✍ G. Levita; A. Livi; P. A. Rolla; C. Culicchi πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 534 KB

The cure process of mixtures of a DGEBA-type epoxy resin and ethylenediamine, in different molar ratios, was investigated by dielectrometry in a wide frequency range, 103-2 10'' Hz, at three temperatures, 25,60, and 70Β°C. Two relaxation processes were found whose relevant parameters were obtained by

Viscosity modeling during epoxy resin cu
Viscosity modeling during epoxy resin cure
✍ George Schmitt; John Wiley; Jeffrey Gotro πŸ“‚ Article πŸ“… 1989 πŸ› Society for Plastic Engineers 🌐 English βš– 468 KB
Cure monitoring of epoxy matrices for co
Cure monitoring of epoxy matrices for composites by ultrasonic wave propagation
✍ A. Maffezzoli; E. Quarta; V. A. M. Luprano; G. Montagna; L. Nicolais πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 202 KB πŸ‘ 2 views

Although ultrasonic wave propagation is a well-known technique for nondestructive analysis, it can be also applied for dynamic mechanical characterization (DMA) of polymers and composites. Most of DMA characterizations at ultrasonic frequencies are performed on thermoplastics and only a few articles