High tensile modulus

Young s modulus of elasticity, or the tensile modulus, is the ratio of the stress applied to the strain within this linear region. It provides an indication of stiffness or how much a material or part will stretch under a given load. For example, a material that has a high tensile modulus is rigid and resists stretching. 

Fibers and films obtained from lyotropic solutions of rigid polymers exhibit high tensile modulus and strength and are therefore of interest for structural applications. Poly(p-phenylene benzobisthiazole) (PBT) is a rigid polymer from which high... 

Since each of these polycarbonates had exceptionally high glass transition temperatures—256° and 290°C., respectively—it was possible to add appreciable amounts of antiplasticizers without depressing the glass transition temperatures to room temperature or lower. In addition, since the bisphenol II polycarbonate already had a relatively high tensile modulus (4.7 X 105 p.s.i.), it was of interest to determine how much this modulus could be increased. 

Reinforcement of epoxy, polyester, and other resins for use in aerospace, marine, automotive and sports industries. We have previously mentioned the vibration damping capacity of Kevlar aramid fiber. Layers of woven Kevlar are used in skis for damping purposes and, of course, to reduce the weight. Kevlar is used as a protective sheath in fiber optic wave guides and to reinforce optical fiber cables because of its high tensile modulus and strength, and low electrical conductivity. 

High Breakdown Strength High Tensile Modulus Low Solubility in Water High Thermal Conductivity... 

High reliability High purity No metal corrosion Long storage life Environmentally safe High tensile modulus ... 

Hoffmann et al. [2000] demonstrated that the low-frequency modulus of exfoU-ated PS-based nanocomposites was higher than for intercalated nanocomposites. This conclusion was confirmed by Mohanty and Nayak [2007], who studied the effect of the MMT exfoliation in PA-6-based CPNCs. The large increase in contact surface between the two phases resulted in improved mechanical properties. The high aspect ratio, p = 200 to 1000, the high tensile modulus of the inorganic filler E 170 GPa), and the large specific surface area (Asp 150 m /g) all play a role in the confinement of the polymer chain—hence in mobility under stress [Yasmin et al., 2006 Utracki, 2009],... 

T. Kanamoto, A. Tsuruta, K. Tanaka, M. Takeda, R.S. Porter, On ultra-high tensile modulus by drawing single crystal mats of high molecular weight polyethylene. Polym. J. 15(4), 327-329 (1983)... 

Polyacrylonitrile, PAN, CHj-CHCC N)-, leads on pyrolysis over an intermediate stage to complete carbonization, as depicted in Fig. 3.51. The final product is used to make strong carbon fibers. The polyacrylonitrile fibers turn yellow to red on the formation of the ladder stmcture shown in the figure. On final carbonization the fiber turns black and consists of graphite-like structures. The carbon fibers have found many applications due to their high tensile modulus in the fiber direction and their, compared to metals, low weight. They are used as fiber reinforcement in epoxy matrices. Typical applications range from aircraft and aerospace to industrial, transportation, and recreational equipment. 

The suture is woven into fibers in order to maximize the resulting stroigth. For materials that possess a high tensile modulus, yams composed of low-denier filaments are bricated into a multifilament braid in order to achieve adequate suppleness. Materials that a tensile modulus of about 500 kpsi or less can be fabricated into... 

Blends of a PO (PE, PP, PB, P4MP, their blends, and copolymers, e.g., with 1-aIkenes, vinyl esters, vinyl chloride, methacrylic esters, and methacrylic acid) with 0.2-50 wt% of a graft copolymer showed high tensile modulus and high sag resistance without increased melt viscosity. The blends could be shaped into foamed profiles at T = 200-230 °C. 

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