Heat capacities of polyethylene from 2 to 360 K. II. Two high density linear polyethylene samples and thermodynamic properties of crystalline linear polyethylene
Year: 1974
Type: article
Abstract: Heat capaci ties of two high density linear polyethylene sa mples were meas ured from 2 to 360 K.By incorporating th e res ults from the previous work of this serie s, thermodynamic properties of compl e tely crystalline lin ea r polyethylene may be estimated.Cp , H -Ho, Sand -(G -Ho) at 298.15 K for crystalline lin ea r polyethylene are estimated to be 22.60 J K-' mol -I, 3544 J mol -I, 23.02 J K-' mol -' and 3319 J mol -I, respectively.Spo ntaneous adiabatic temperature drifts were obse rved in both sa mpl es near 240 K.These drifts may be attributed to the enthalpy re laxation ph enome na occ urrin g in the glass tran sformation region.
Author: S.S. Chang
Institution: National Institute of Standards and Technology
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2323629670