POLYMETHYLMETHACRYLATE FILMS IN THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION*

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POLYMETHYLMETHACRYLATE FILMS IN THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION*

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- POLYMETHYLMETHACRYLATE FILMS IN THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION*
- Vol. 17, Issue 3, Pages: 215-220(1999)
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- Published：20 June 1999
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POLYMETHYLMETHACRYLATE FILMS IN THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION*[J]. 1999, 17(3): 215-220.
DOI：

POLYMETHYLMETHACRYLATE FILMS IN THE STATE OF HIGH GLOBAL CHAIN ORIENTATION BUT NEARLY RANDOM SEGMENTAL ORIENTATION*[J]. 1999, 17(3): 215-220. DOI：

摘要

PMMA films in the high global chain orientation and nearly random segmental orientation(GOLR) state were prepared by uni-axially drawing at temperatures 20～30℃ above its glass transitiontempefature

T_g

and their isotropic and anisotropic properties were studied. Experimental results show thatthis kind of amorphous state

the GOLR state

is nearly isotropic in optical birefringence

IR-dichroism andX-ray diffraction patterns

but is very anisotropic in behaviors of thermal expansion

solvent-swelling and stress-strain.

Abstract

T_g

and their isotropic and anisotropic properties were studied. Experimental results show thatthis kind of amorphous state

the GOLR state

is nearly isotropic in optical birefringence

IR-dichroism andX-ray diffraction patterns

but is very anisotropic in behaviors of thermal expansion

solvent-swelling and stress-strain.

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