Methods to Understand, Monitor, and Extend Prepreg Shelf Life
Abstract
The objectives of this project were to (a) characterize the effects of freezer storage and out-time on thermoset polymer prepregs, (b) develop a method for measuring accrued shelf-life of prepreg using non-invasive in situ monitoring, and (c) identify and impose adjusted process conditions (cure cycles) to extend prepreg shelf-life to produce laminates with equivalent performance to material produced under recommended prepreg storage and processing conditions, thereby eliminating the detrimental effects of protracted storage. The methods developed during this project will restore full value and performance to most prepreg materials currently considered waste, while ensuring that fabricated parts will achieve equivalent performance and exhibit fewer process-induced defects arising from protracted storage. In doing so, this work will reduce waste streams associated with time-expired materials, reducing total production costs and environmental impact.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 22, 2020
- Accession Number
- AD1154586
Entities
People
- Steven Nutt
Organizations
- University of Southern California