Tensile Properties, Resins

Bisphenol A diglycidyl ether [1675-54-3] reacts readily with methacrylic acid [71-49-4] in the presence of benzyl dimethyl amine catalyst to produce bisphenol epoxy dimethacrylate resins known commercially as vinyl esters. The resins display beneficial tensile properties that provide enhanced stmctural performance, especially in filament-wound glass-reinforced composites. The resins can be modified extensively to alter properties by extending the diepoxide with bisphenol A, phenol novolak, or carboxyl-terrninated mbbers. 

Figure 4 Tensile properties of metallocene LLDPE (Ethylene-hexene resin, transverse direction). (From Ref. 11.)...

ISO 10618 2004 Carbon fibre - Determination of tensile properties of resin-impregnated yarn... 

ASTM D 3039 (1982). Test method for tensile properties of fiber-resin composites. 

In addition, ASA may be blended with other polymers that themselves exhibit high heat distortion temperatures. For example, blends of poly(ether imide) and ASA exhibit an improved heat distortion temperature, improved flexural properties and tensile properties in comparison to the ASA component alone and have lower impact strengths as well (35). The statement above has been exemplified using Ultem 1000 as a poly(ether imide) resin and Geloy 1020 as ASA component. 

Typical physical properties for an injection-molded transparent acrylic polyblend resin are given in Table II. The injection molding conditions used are given in Table III. Tensile, flexural, and impact properties are within the range reported for typical ABS and high impact polystyrene resins. Optical properties approach those of the acrylics [i.e., poly (methyl methacrylate)]. The strength properties are on the low side of those reported in the first paper for the transparent diene... 

This moldable material primarily consists of TS polyester resin, glass fiber reinforcement, and filler. Additional ingredients, such as low-profile additives, cure initiators, thickeners, and mold-release agents are used to enhance the performance or processing of the material. As with any material, such as metallics and plastics, SMC can be formulated in-house or by compounders to meet performance requirements of a particular application such as tensile properties or Class A surface finish. Varying the type and percentage of the composition will result in variations in mechanical properties and processability. 

Table IV. Tensile Properties of Polymyrcene-Modified, Polyurethane Resins...

The micromechanical deformation behavior of SAN copolymers and rubber-reinforced SAN copolymers have been examined in both compression [102] and in tension [103,104]. Both modes are important, as the geometry of the part in a given application and the nature of the deformation can create either stress state. However, the tensile mode is often viewed as more critical since these materials are more brittle in tension. The tensile properties also depend on temperature as illustrated in Figure 13.6 for a typical SAN copolymer [27]. This resin transforms from a brittle to ductile material under a tensile load between 40 and 60 C. 

Figure 13.6 Temperature dependence of the tensile properties of a SAN resin. Reprinted with permission from Throne, J.TechnologyofThermoformina, Hanser Publishers, Munich, Copyright 1996...

Figure 11.13 shows that in ajute filled epoxy resin, water intake increases with time of immersion and with the amount of fiber. This jute fibers readily absorb water. A surface treatment of the jute with epoxy silane reduces the water intake. Tensile properties of a composite containing surface treated fiber remain constant up to a moisture content of 5%. 

Figure 4. Tensile properties of Series E and Series F networks as a function of Me (O) commercial resins bimodal blends...

Table 6.38. Tensile Properties of Compression Molded Alloys of ETFE and EHMW-FEP Resins ...

Also coupons of different and resin were similarly prepared so as to study the possible use of the prepreg as reinforcement. The tensile properties at 0° and 90° were then obtained using the Instron tensometer in accordance to ASTM D882-73 using a cross-head speed of 5 cm/min. 

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