Photodegradation of Polyimides. 3. The Effect of Chemical Composition, Radiation Source, Atmosphere, and Processing

reportActive / Technical Report | Accession Number: ADA236197 | Open PDF

Abstract:

Polyimide films made from diarylanhydrides with oxygen, carbonyl, and hexafluoroisopropylidene 6F bridging groups are photolabile when irradiated with unfiltered light from a medium pressure mercury lamp. The presence of oxygen is necessary to the photolytic degradation process, which results in the ultimate oxidative ablation of thin polyimide films. Films based on the 6F dianhydride containing a hexafluoroisopropylidene hinge group are the most unstable. However, photolysis of 6F dianhydride based polyimides in an inert atmosphere with either the unfiltered medium pressure mercury lamp or an electron beam results in no detectable changes even after long exposure times.

Author(s):
Hoyle, Charles E. ; Anzures, Edgardo T.
Author Organization(s):
UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF POLYMER SCIENCE
Descriptive Note:
Technical rept. no. 8, 1 Jun 1990-31 May 1991,
Pagination:
0044

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-89-J-1028
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_6.3_Net Management; JCA_5_Command and Control; JCA_5.3_Planning; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_6.1_Information Transport
Communities of Interest:
Advanced Electronics
Descriptor(s):
*ABLATION, RADIATION, DEGRADATION, EXPOSURE(GENERAL), PHOTOLYSIS, THIN FILMS, LIGHT, FILMS, CHEMICAL COMPOSITION, OXYGEN, ELECTRON BEAMS, OXIDATION, PRESSURE, ATMOSPHERES, RARE GASES, PHOTODEGRADATION, POLYIMIDE RESINS, MERCURY LAMPS, SOURCES
Field(s)/Group(s):
Plastics, Solid State Physics
Keyword(s):
*POLYIMIDE RESINS, *THIN FILMS, *PHOTODEGRADATION, *SEMICONDUCTING FILMS, DIANHYDRIDES, CONTROLLED ATMOSPHERES, CHEMICAL COMPOSITION, AROMATIC COMPOUNDS
Report Date:
1991 May 31