Heat capacity measurements on polyethylene in the temperature range of 2.4 to 30°K.

dc.contributor.advisorReese, William
dc.contributor.authorTucker, James Earl
dc.date.accessioned2012-08-09T19:32:07Z
dc.date.available2012-08-09T19:32:07Z
dc.date.issued1966-05
dc.description.abstractSpecific heat measurements on three samples of polyethylene, differing only in density, were made in the temperature range of 2.H to 30°K. A definite density dependence was noted for the specific heat in this temperature interval which allowed extrapolation of the data to completely crystalline and completely amorphous cases. At the lowest temperatures, the amorphous results were observed to display an "excess" heat capacity which could be accounted for by the occurance of a single delta function peak in the low frequency part of the vibrational spectrum. This excess did not appear in the completely crystalline extrapolated data, and the specific heat was found to be proportional to the cube of the temperature up to 9°K. An attempt was made to compare the results with two theoretical models (Tarasov and Stockmayer-Hecht) with only fair agreement in one case, and none in the other. The agreement with previous experimental results is excellent if the density dependence and the excess heat capacity are considered.en_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.
dc.description.serviceLieutenant Commander, United States Navyen_US
dc.description.urihttp://archive.org/details/heatcapacitymeas109459528
dc.identifier.urihttps://hdl.handle.net/10945/9528
dc.language.isoen_US
dc.publisherMonterey, California. U.S. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshPhysicsen_US
dc.titleHeat capacity measurements on polyethylene in the temperature range of 2.4 to 30°K.en_US
dc.typeThesisen_US
dspace.entity.typePublication
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.namePh.D.en_US
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
heatcapacitymeas00tuck.pdf
Size:
4.73 MB
Format:
Adobe Portable Document Format
Collections