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Chain entanglement in thin freestanding polymer films.

Content Provider	Semantic Scholar
Author	Si, Lun Massa, Michael V. Dalnoki-Veress, Kari Brown, Hugh R. Jones, Richard A. L.
Copyright Year	2005
Abstract	When a thin glassy film is strained uniaxially, a shear deformation zone (SDZ) can be observed. The ratio of the thickness of the SDZ to that of the undeformed film is related to the maximum extension ratio, lambda, which depends on the entanglement molecular weight, M(e). We have measured lambda as a function of film thickness in strained freestanding films of polystyrene as a probe of M(e) in confinement. It is found that thin films stretch further than thick films before failure, consistent with the interpretation that polymers in thin films are less entangled than bulk polymers, thus the effective value of M(e) in thin films is significantly larger than that of the bulk. Our results are well described by a conceptually simple model based on the probability of finding intermolecular entanglements near an interface.
Starting Page	127801
Ending Page	127801
Page Count	1
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://softmachines.org/PDFs/Lun_Si_PRL.pdf
Alternate Webpage(s)	http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1278&context=engpapers
Alternate Webpage(s)	https://ro.uow.edu.au/cgi/viewcontent.cgi?article=6343&context=engpapers
Alternate Webpage(s)	http://www.softmachines.org/PDFs/Lun_Si_PRL.pdf
Alternate Webpage(s)	https://ro.uow.edu.au/cgi/viewcontent.cgi?article=1278&context=engpapers&httpsredir=1&referer=
Alternate Webpage(s)	http://ro.uow.edu.au/cgi/viewcontent.cgi?article=6343&context=engpapers
PubMed reference number	15903962v1
Volume Number	94
Issue Number	12
Journal	Physical review letters
Language	English
Access Restriction	Open
Subject Keyword	Basement membrane zone BP180 Ab:ACnc:Pt:Ser:Qn:IA Large Molecular Weight Polymers Polystyrenes
Content Type	Text
Resource Type	Article

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