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

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Author	Search for: Yamasaki, R. S.; Search for: Blaga, A.¹
Affiliation	National Research Council Canada
Format	Text, Article
Subject	polycarbonate; 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.
Publication date	1977-07
In	Materials and Structures 10, no. 58 (July 1977): 197–204.
Language	English
Peer reviewed	Yes
Identifier	DBR-P-741
NRC number	NRCC 16318 NRC-IRC-2832
NPARC number	20373815
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Record identifier	981b5da4-9f4d-4732-b561-810f754f39bf
Record created	2012-07-23
Record modified	2024-03-14

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