Title

High Strength Epon Laminates

Date

1952

Index Abstract

Online

Photo Quality

Not Needed

Report Number

WADC TR 52-5 Supplement 1

Creator

Hopper, F. C.

Elam, D. W.

Corporate Author

Shell Development Company

Laboratory

Materials Laboratory

Extent

29

PB Number

PB119613

Identifier

AD0004231

AD Number

4231

Access Rights

Notice(s)

Distribution Classification

1

Contract

AF 33(038)-19587

DoD Project

None Given

DoD Task

None Given

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

AFAL LTR

Distribution Change Action Date

1/1/1900

Distribution Conflict

Fix

Index Price

$2.70

Index In

U.S. Government Research Reports, vol. 25, no. 4, p.147, 4/13/1956

Abstract

A laminate made from 181-114 glass fabric and EPON 1001 resin cured with dicyandiamide had a flexural strength of 76,900 psi at room temperature and 76,200 psi at 160°F (after 1/2 hour at 160F). The compressive strength was 70,200 psi at room temperature.With EPON laminates of this type, either boiling in water or aging at 95-100% relative humidity and 100F for one hour caused a greater loss in strength than soaking for 30 days.Improved Volan finish was the best of four new fabric finishes used in laminating with EPON 1001 and was the only finish better than 114.Remarkably high strengths at elevated temperatures were obtained with an experimental resin known as EPON X-12100. Laminates made with this resin had a flexural strength above 60,000 psi at 392F after 30 minutes at that temperature. Liquid EPON resins 828 and 834 cured with dicyandiamide also produced laminates resistant to temperatures up to 300F. After 1/2 hour at that temperature flexural strengths up to 44,000 psi were obtained. Aging for 200 hours at 300F resulted in 52,900 psi flexural strength in one laminate. At higher temperatures, strengths fell off markedly.Dimethyl cyanamide, a liquid curing agent, used with EPONS 828 and 834 produced laminates having up to 53,100 psi flexural strength at 392F. This curing agent is toxic.Flexural strengths at 300F after 1/2 hour at 300F up to 54,400 psi were obtained also in laminates made with mixtures of Plyophen 5015 (a phenolic resin) and EPON 1001, cured with dicyandiamide.Of four large laminate 1/8" x 38" x 96" made with EPON 1001 at 25 psi, one was of excellent quality and another was considered good. There should be no difficulty in making EPON laminates of any large area.

Report Availability

Full text available

Date Issued

1952-02

Provenance

IIT

Type

report

Format

1 online resource