1993
DOI: 10.1002/pen.760331503
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Rheological behavior of a semirigid liquid crystal polymer

Abstract: The rheological behavior of liquid crystal polymers is still far from completely clarified from both experimental and theoretical points of view. In this paper, the shear flow and the non-isothermal elongation flow behavior of a semirigid liquid crystal copolyester is discussed. The viscosity strongly decreases when the test temperature is increased above the crystal-nematic transition temperature: below this temperature the viscosity is very high. The thermal history strongly affects the shear viscosity. The … Show more

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Cited by 19 publications
(22 citation statements)
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“…The semirigid LCP is a semirigid copolyester made from sebacic acid, 4.4'dihydroxybiphenyl, and 4-hydroxybenzoic acid in the molar ratio 1 : 1 : 2. Synthesis and properties of this copolyster are presented elsewhere (29)(30)(31)(32).…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…The semirigid LCP is a semirigid copolyester made from sebacic acid, 4.4'dihydroxybiphenyl, and 4-hydroxybenzoic acid in the molar ratio 1 : 1 : 2. Synthesis and properties of this copolyster are presented elsewhere (29)(30)(31)(32).…”
Section: Methodsmentioning
confidence: 99%
“…7, is lower than that of PP only at temperatures above 220°C: at lower temperatures it becomes larger. The viscosity of the blend with 20% SBH is intermediate at high temperatures, lower than that of both components at intermediate temperatures, and then overcomes that of the PP at low temperatures when the SBH is crystallized (Tc 170°C) (31). It is worth mentioning that the crystallization temperatures of the LCPs is lower than the melting temperature.…”
mentioning
confidence: 93%
“…The semiflexible LCP, referred to as SBH, was a laboratory sample (LCPlB/024) kindly supplied by Eniricerche S.p.A., Milan. This copolyester was synthesized as described elsewhere (32)(33)(34)(35) Phase Behavior of Blends of PET with JXPs no1 at 60°C with a concentration of 0.1 g/dL, was 1.20 dL/g. The chemical structures of all the investigated polymers are shown in Scheme 1.…”
Section: Materialamentioning
confidence: 99%
“…Semirigid polymers often require more energy during processing and modification compared with flexible polymers. [6d,7]…”
Section: Introductionmentioning
confidence: 99%