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FTIR and DSC study of HDPE structural changes and mechanical properties variation when exposed to weathering aging during Canadian winter
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1996
Year
Crystallinity ReductionEngineeringMechanical EngineeringEarth ScienceFreeze-thaw CyclingHdpe Structural ChangesPlastic DegradationWeatheringPolymer ChemistryMaterials SciencePolymer StabilityHigh-density PolyethyleneCryospherePolymer AnalysisPlasticityFtir SpectrophotometryDegradable PlasticCivil EngineeringPolymer ScienceDsc StudyMechanical Properties Variation
The aging of high-density polyethylene (HDPE) when exposed to drastic climatic conditions (Canadian winter, characterized by low temperature and abrupt temperature variations between the night and the day) was studied. The importance of degradation was determined by evaluating the microstructural changes in HDPE (i.e., oxidations, ramifications, and polymeric chain breaking) by means of FTIR spectrophotometry. The crystallinity variation in HDPE by FTIR and DSC was also studied. Both techniques led to coherent results: there was a loss of crystallinity due to weathering degradation. This crystallinity reduction produced a drastic decrease in impact energy. However, the other properties evaluated were not significantly affected. © 1996 John Wiley & Sons, Inc.