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Degradation of polycarbonate sheeting on outdoor exposure. Relationship between changes in molecular weight and tensile properties

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada
FormatText, Article
Subjectpolycarbonate; weathering; glazings; crackings (breaking); fracture strength; solar radiation; tensile strength
Abstract
To obtain better understanding of surface microcracking of polycarbonate (PC) glazing during outdoor exposure, and to determine the effect of weathering on its fracture resistance, changes in molecular weight and tensile properties during outdoor and various artificial weathering were studied. During outdoor weathering, the ultimate elongation and ultimate tensile stress decreased showing that PC became less ductile and more susceptible to fracture. The occurrence of surface microcracking of PC is attributed to a combination of a decrease in ultimate tensile stress and ductility of surface layer due to UV radiation, and alternating stresses due, primarily, to temperature changes.
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  • Materials and Structures 10, no. 58 (July 1977): 197–204.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-741
NRC numberNRCC 16318
NRC-IRC-2832
NPARC number20373815
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Record identifier981b5da4-9f4d-4732-b561-810f754f39bf
Record created2012-07-23
Record modified2024-03-14
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