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Title: Creep Analysis of Poly(ester urethane) Copolymer by Dynamic Mechanical Analysis (DMA): Melt Determination

Abstract

An experiment is presented utilizing film tension, creep test dynamic mechanical analysis (DMA) to characterize the physical properties of a poly(ester urethane) block copolymer, Estane ® 5703. The polymer was pressed into a sheet from pellet form and cut into strips for analysis utilizing the TA Q800 DMA with film tension clamp. The strips were tested under five constant stress analyses from 0.125 to 0.625, at 0.125 MPa increments. Each analysis was run stepwise through a temperature gradient from 25 °C to 67 .5 °C with 2.5 °C increments, the material reached the instrument maximum displacement at different temperature steps dependent on the constant applied stress. At each of the 18 temperature steps the material was held at constant stress for 10 minutes and allowed to recover under stress-less conditions for 20 minutes. With data analysis recoverable strain data was produced and ultimately a curve of Modulus at temperature, the regression extrapolated to modulus = 0 M Pa. The extrapolated point correlated with data the weighted average melt point of the polymer measured by MDSC, within the regressive least squares fit of the measured moduli. Thereby measuring the melt temperature of a polymer by DMA. This is the third inmore » a series of three reports 4,5 on the physical properties and degradation processes of materials used in polymer bonded explosive 9501 written for submission to the University of Oregon, Masters Industrial Internship Program.« less

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1440468
Report Number(s):
LA-UR-18-24735
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Edgar, Alexander Steven. Creep Analysis of Poly(ester urethane) Copolymer by Dynamic Mechanical Analysis (DMA): Melt Determination. United States: N. p., 2018. Web. doi:10.2172/1440468.
Edgar, Alexander Steven. Creep Analysis of Poly(ester urethane) Copolymer by Dynamic Mechanical Analysis (DMA): Melt Determination. United States. doi:10.2172/1440468.
Edgar, Alexander Steven. Fri . "Creep Analysis of Poly(ester urethane) Copolymer by Dynamic Mechanical Analysis (DMA): Melt Determination". United States. doi:10.2172/1440468. https://www.osti.gov/servlets/purl/1440468.
@article{osti_1440468,
title = {Creep Analysis of Poly(ester urethane) Copolymer by Dynamic Mechanical Analysis (DMA): Melt Determination},
author = {Edgar, Alexander Steven},
abstractNote = {An experiment is presented utilizing film tension, creep test dynamic mechanical analysis (DMA) to characterize the physical properties of a poly(ester urethane) block copolymer, Estane ® 5703. The polymer was pressed into a sheet from pellet form and cut into strips for analysis utilizing the TA Q800 DMA with film tension clamp. The strips were tested under five constant stress analyses from 0.125 to 0.625, at 0.125 MPa increments. Each analysis was run stepwise through a temperature gradient from 25 °C to 67 .5 °C with 2.5 °C increments, the material reached the instrument maximum displacement at different temperature steps dependent on the constant applied stress. At each of the 18 temperature steps the material was held at constant stress for 10 minutes and allowed to recover under stress-less conditions for 20 minutes. With data analysis recoverable strain data was produced and ultimately a curve of Modulus at temperature, the regression extrapolated to modulus = 0 M Pa. The extrapolated point correlated with data the weighted average melt point of the polymer measured by MDSC, within the regressive least squares fit of the measured moduli. Thereby measuring the melt temperature of a polymer by DMA. This is the third in a series of three reports 4,5 on the physical properties and degradation processes of materials used in polymer bonded explosive 9501 written for submission to the University of Oregon, Masters Industrial Internship Program.},
doi = {10.2172/1440468},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2018},
month = {Fri Jun 01 00:00:00 EDT 2018}
}

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