NDLI: Rheology and structure change of poly(ether-block-amide) segmented block copolymer

Content Provider	Springer Nature Link
Author	Yang, I. Kuan Tsai, Ping Hung
Copyright Year	2007
Abstract	Melt of a segmented block copolymer constituting of poly (lauryl lactam) as the hard segment and poly (tetramethylene oxide) as the soft segment was investigated by rheological techniques. Storage modulus of the polymer melt exhibits the non-terminal behavior resembling those of diblock and triblock copolymer melts, indicating the existence of a microphase separated structure. Contrarily to most block copolymers, the melt of the segmented block copolymer transforms from a weak structure to a stiff one upon raising temperature. Atomic force microscopic data in tapping mode reveal that at low temperatures the structure of the melt is constituted of small spherical soft domains dispersed in a hard matrix and the hardness of the matrix differs slightly from that of the domains; at high temperatures the spherical domain structure preserves but the domain becomes larger and so does the hardness difference between the domain and the matrix. Infrared spectrum analysis shows that the temperature induced structural change is related to the dissociation of hydrogen bonding between the hard and the soft segments.
Starting Page	146
Ending Page	150
Page Count	5
File Format	PDF
ISSN	10059784
Journal	Journal of Central South University of Technology
Volume Number	14
Issue Number	1
e-ISSN	19930666
Language	English
Publisher	Central South University of Technology
Publisher Date	2007-01-01
Publisher Place	Changsha
Access Restriction	Subscribed
Subject Keyword	poly(ether-block-amide) rheology infrared spectrum microphase separation hydrogen bonding atomic force microscopy Engineering Metallic Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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