The friction angle in plasticized epoxy polymers during polymerization

Theocaris, PS; Koroneos, E

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Koroneos, E	en
dc.date.accessioned	2014-03-01T01:37:47Z
dc.date.available	2014-03-01T01:37:47Z
dc.date.issued	1975	en
dc.identifier.issn	00354511	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21734
dc.title	The friction angle in plasticized epoxy polymers during polymerization	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF01515934	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF01515934	en
heal.publicationDate	1975	en
heal.abstract	The behaviour of pure and plasticized epoxy polymers submitted to double shear and a simultaneous normal stress is studied with respect to time, during the period of polymerization. In this experimental investigation the angle of friction was studied and its dependence on the loading conditions and the polymerization time was measured. As angle of friction is defined the angle whose tangent expresses the ratio of the shear stress rate to the applied normal stress rate, necessary to fracture the bond in a double shear test. Thin layers of plasticized epoxy polymers were used to cement together the plane surfaces of identical shear specimens made of plasticized epoxy polymers. Various amounts of plasticizer were added in these cements and the shear force was measured, necessary to brake the bonds between cemented beams held together by normal forces of different amounts. The shear forces were applied at different times as the polymerization of the cement progressed from zero time during casting, up to the end of the polymerization process. Nomograms derived from these measurements expressing the variation of the shear force versus the normal force for failure of the bond as well as the friction angle versus the shear stress for fracture disclosed the influence of the amount of plasticizer and the polymerization time on these quantities. These results may be applied for the study of multilayer systems as well as to systems only partly polymerized. © 1975 Dr. Dietrich Steinkopff Verlag.	en
heal.publisher	Steinkopff-Verlag	en
heal.journalName	Rheologica Acta	en
dc.identifier.doi	10.1007/BF01515934	en
dc.identifier.volume	14	en
dc.identifier.issue	8	en
dc.identifier.spage	745	en
dc.identifier.epage	752	en