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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 Date1988 Jun 01
OSTI IdentifierOSTI ID: 6932588; DE88014154
Report Number(s)UCRL-98560-Pt.1;CONF-8810123-1-Pt.1
DOE Contract NumberW-7405-ENG-48
Resource TypeConference
Specific TypeTechnical Report
Resource Relation17. North American Thermal Analysis Society (NATAS) conference; 9 Oct 1988; Orlando, FL, USA; Portions of this document are illegible in microfiche products
Research OrgLawrence Livermore National Lab., CA (USA)
Subject360602 -- 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 SubjectCHEMICAL 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 PublicationUnited States
LanguageEnglish
FormatPages: 11
AvailabilityNTIS, PC A03/MF A01; 1.
System Entry Date2001 May 13

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