Bibliographic Citation
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Title | Dynamic mechanical and thermal analysis of crystallinity development in Kel-F 800 and TATB/Kel-F 800 plastic bonded explosives: Part 1, Kel-F 800 |
Creator/Author | Hoffman, D.M. ; Matthews, F.M. ; Pruneda, C.O. |
Publication Date | 1988 Jun 01 |
OSTI Identifier | OSTI ID: 6932588; DE88014154 |
Report Number(s) | UCRL-98560-Pt.1;CONF-8810123-1-Pt.1 |
DOE Contract Number | W-7405-ENG-48 |
Resource Type | Conference |
Specific Type | Technical Report |
Resource Relation | 17. North American Thermal Analysis Society (NATAS) conference; 9 Oct 1988; Orlando, FL, USA; Portions of this document are illegible in microfiche products |
Research Org | Lawrence Livermore National Lab., CA (USA) |
Subject | 360602 -- Other Materials-- Structure & Phase Studies ;450100 -- Military Technology, Weaponry, & National Defense-- Chemical Explosions & Explosives; EXPLOSIVES-- BINDERS;KEL-F-- CRYSTALLIZATION; AMORPHOUS STATE;ANNEALING;FUSION HEAT;TATB;THERMAL CYCLING |
Related Subject | CHEMICAL EXPLOSIVES;ENTHALPY;EXPLOSIVES;HEAT TREATMENTS;ORGANIC CHLORINE COMPOUNDS;ORGANIC COMPOUNDS;ORGANIC FLUORINE COMPOUNDS;ORGANIC HALOGEN COMPOUNDS;ORGANIC POLYMERS;PHASE TRANSFORMATIONS;PHYSICAL PROPERTIES;POLYETHYLENES;POLYMERS;POLYOLEFINS;THERMODYNAMIC PROPERTIES;TRANSITION HEAT |
Description/Abstract | Dynamic mechanical and differential scanning calorimeter measurements were made on Kel-F 800, a copolymer of chlorotrifluoroethylene and vinylidene fluoride, as a function of time.^Samples annealed over a 30-day period at 50/degree/C showed reduced relaxation strength in the glass-transition which directly correlated with the development of between 10 and 15% crystallinity in this polymer.^Kel-F 800 samples were thermally cycled from /minus/54 to 74/degree/C without annealing for 12, 24, and 36 cycles developed only about half the crystallinity of annealed samples.^Kel-F 800 which was annealed 30 days and subsequently subjected to the above thermal cycling retained almost all of the crystallinity which developed during the annealing process.^These results indicate that Kel-F 800 copolymer crystallizes at an extremely slow rate, but as long as the thermal excursion remains below the major melting peak most of the crystallinity remains.^11 refs., 5 figs., 1 tab. |
Country of Publication | United States |
Language | English |
Format | Pages: 11 |
Availability | NTIS, PC A03/MF A01; 1. |
System Entry Date | 2001 May 13 |
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