Article Review on Vectran-Super Fiber from Thermotropic Crystals of Rigid-Rod Polymer

Abstract

According to the economic and environmental perspective, multifilament Vectran, yarn spun from liquid crystal polymer, is important because of its quite simple processing during spinning in a wide range of injection moulding, extrusion moulding, and melt spinning. Vectran fiber is an aromatic polyester spun from a liquid crystal polymer in a melt extrusion process. This process orients the molecules along the fiber axis, resulting in a high tenacity fiber, and Vectran melts at 330°C. Heat treatment can improve and vary the tensile strength of Vectran fiber. On average, tensile strength for Vectran is 26 grams/denier (grouped as a high tenacity grade) and the strength of the fiber is maintained after several flexing and bending actions. Abrasion resistance of Vectran is even higher than a similarly sized aramid yarn. In addition, the original dimensions are maintained under variance of temperature with negligible creep and shrinkage. Vectran fiber, characterized by its golden color, high strength and modulus, thermal stability at high temperatures, low creep, and good chemical stability, can be used in many various industries starting from ropes and cables to profound sea survey and military products.

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic and Hydroxybiphenylcarboxylic Acids

“…Coextrusion of TMCPs and conventional thermoplastics results in self-reinforced composites or composites in situ [9][10][11][12][13][14]. The mechanical properties of TMCP fibers are comparable to that of aramid fibers [6]. It should be noted, water absorption and atmosphere stability of TMCPs are significantly higher than that of aramid fibers.…”

“…Thermotropic main-chain polyesters (TMCPs) belongs to a class of high-performance polymer with a number of unique properties [1][2][3][4][5][6][7][8][9]. TMCP backbone contains aromatic rigid units such as 1,4phenylene, 2,6-naphthalene and 4,4′-biphenylene, defining the formation of highly ordered nematic melts.…”

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic, and Hydroxybiphenylcarboxylic Acids

“…Thermotropic main-chain polyesters (TMCPs) are a class of high-performance polymers with a number of unique properties [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. TMCPs are capable of forming highly ordered liquid crystalline melts and do not require solvents during processing, unlike materials produced from lyotropic solutions such as aramid fibers.…”

“…Co-extrusion of TMCPs and conventional thermoplastics results in self-reinforced composites or in situ composites [ 9 , 10 , 11 , 12 , 13 , 14 ]. The mechanical properties of TMCP fibers are comparable to those of aramid fibers [ 6 , 15 , 16 ]. For instance, the tensile strength of Vectran HS fibers was found to be ~3 GPa [ 15 ].…”