Effect of polyphosphazene and modified carbon nanotubes on the morphological and thermo-mechanical properties of polyphenylene sulfide and liquid crystalline polymer blend system

Polymer blend technology is attractive from the standpoint of both science and industry, and many combinations have been studied. Recently, the polymer blends, including liquid crystalline polymer, have been especially worthy of notice, [1,2,3]. In order to obtain materials with a high mechanical strength and moldability for use in thin molded items, we chose polyamide (PA)-liquid crystalline polymer (LCP) blends. In this study, we first measured the mechanical properties, then studied the features of the polymer structure. We also examined the relationship between morphology and mechanical properties. As a result, we found that the mechanical properties of the blends depended largely on blend morphology, and that mechanical strength increased as blend compatibility increased. On the other hand, we also found that the blends showed compatible and microheterogeneous dispersion at less than 25 wt% LCP, while at more than 30 wt% LCP, blends tended to show twophase separation.

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Compatibilization of polyetherimide/liquid crystalline polymer blend using modified multiwalled carbon nanotubes and polyphosphazene as compatibilizers

Journal of Applied Polymer Science ◽

10.1002/app.35005 ◽

2011 ◽

Vol 124 (1) ◽

pp. 629-637 ◽

Cited By ~ 12

Author(s):

Ganesh C. Nayak ◽

Sumanta Sahoo ◽

Sukanta Das ◽

G. Karthikeyan ◽

Chapal K. Das ◽

...

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Polymer Blend ◽

Liquid Crystalline Polymer ◽

Liquid Crystalline ◽

Crystalline Polymer ◽

Multiwalled Carbon

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Melt-mixed composites of multi-walled carbon nanotubes and thermotropic liquid crystalline polymer: Morphology, rheology and mechanical properties

Composites Science and Technology ◽

10.1016/j.compscitech.2017.07.024 ◽

2017 ◽

Vol 151 ◽

pp. 184-192 ◽

Cited By ~ 9

Author(s):

R. Vivek ◽

Kuruvilla Joseph ◽

George P. Simon ◽

Arup R. Bhattacharyya

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Liquid Crystalline Polymer ◽

Liquid Crystalline ◽

Crystalline Polymer ◽

Polymer Morphology ◽

Thermotropic Liquid Crystalline Polymer ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Structure and Mechanical Properties of Injection Molding of Liquid Crystalline Polymer/Polyphenylene Sulfide Binary Blends.

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.42.364 ◽

1993 ◽

Vol 42 (475) ◽

pp. 364-370 ◽

Cited By ~ 1

Author(s):

Wataru MIZUNO ◽

Yasutaka HOSONO ◽

Hiroyuki HAMADA ◽

Zenichiro MAEKAWA ◽

Mutuko OHTA ◽

...

Keyword(s):

Mechanical Properties ◽

Injection Molding ◽

Liquid Crystalline Polymer ◽

Liquid Crystalline ◽

Crystalline Polymer ◽

Polyphenylene Sulfide ◽

Binary Blends

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Fiber Formation and Structural Development of HBA/HNA Thermotropic Liquid Crystalline Polymer in High-Speed Melt Spinning

Polymers ◽

10.3390/polym13071134 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1134

Author(s):

Bo Seok Song ◽

Jun Young Lee ◽

Sun Hwa Jang ◽

Wan-Gyu Hahm

Keyword(s):

Mechanical Properties ◽

Shear Rate ◽

High Speed ◽

Melt Spinning ◽

Liquid Crystalline Polymer ◽

Liquid Crystalline ◽

Crystalline Polymer ◽

Fiber Formation ◽

Structural Development ◽

Thermotropic Liquid Crystalline Polymer

High-speed melt spinning of thermotropic liquid crystalline polymer (TLCP) resin composed of 4-hydroxybenzoic acid (HBA) and 2-hydroxy-6-napthoic acid (HNA) monomers in a molar ratio of 73/27 was conducted to investigate the characteristic structure development of the fibers under industrial spinning conditions, and the obtained as-spun TLCP fibers were analyzed in detail. The tensile strength and modulus of the fibers increased with shear rate in nozzle hole, draft in spin-line and spinning temperature and exhibited the high values of approximately 1.1 and 63 GPa, respectively, comparable to those of industrial as-spun TLCP fibers, at a shear rate of 70,000 s−1 and a draft of 25. X-ray diffraction demonstrated that the mechanical properties of the fibers increased with the crystalline orientation factor (fc) and the fractions of highly oriented crystalline and non-crystalline anisotropic phases. The results of structure analysis indicated that a characteristic skin–core structure developed at high drafts (i.e., spinning velocity) and low spinning temperatures, which contributed to weakening the mechanical properties of the TLCP fibers. It is supposed that this heterogeneous structure in the cross-section of the fibers was induced by differences in the cooling rates of the skin and core of the fiber in the spin-line.

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