Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/46454

Viscosity changes due to TLCP melt structure development in very low concentration TLCP/HMMPE blends

Authors Whitehouse, Claire HKUST affiliated (currently or previously)
Lu, Xue Hong
Gao, Ping View this author's profile
Issue Date 1998
Source CONFERENCE PROCEEDINGS AT ANTEC '98: PLASTICS ON MY MIND, VOLS I-3: VOL I; PROCESSING, VOL II; SPECIAL AREAS, VOL III; MATERIALS , v. 44, 1998, p. 1006-1010
Summary A low nematic transition temperature thermotropic liquid crystalline polymer (TLCP), copolyester of HBA/HQ/SA, acts as a processing aid for high molecular mass high density polyethylene (HMMPE). Even at TLCP concentrations of 0.2, 0.5 and 2 wt%, there is a bulk viscosity reduction >90% at 185 degrees C. The processing window is expanded from a shear rate of 100 s(-1) to > 1000 s(-1). Rheo-optical studies show the melt structure is an important factor in reducing viscosity: biphasic, anisotropic TLCP being best. The mechanism is believed to be the forced alignment of HMMPE molecules in the presence of highly oriented TLCP molecules.
Subjects
ISBN 1-56676-669-9
Language English
Format Conference paper
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