Mechanical strength and toughness

Poly (iminocarbonates) are little known polymers that, in a formal sense, are derived from polycarbonates by the replacement of the carbonyl oxygen by an imino group (Fig. 5). This backbone modification dramatically increases the hydrolytic lability of the backbone, without appreciably affecting the physicomechanical properties of the polymer the mechanical strength and toughness of thin,... 

The role of alloying elements in weathering steels consists of the effect of formation of the protective layer of corrosion products increase in mechanical strength and toughness and improved weldability. The protective qualities of the corrosion products on the steel depend on the continuous growth of the adherent, compact, inner layer and on low porosity within the layer. The kinetics of atmospheric corrosion were found to obey the equation,... 

Fortunately, it is found that some alkyl-aryl copolymers have mechanical strength and toughness exceeding those of the pure alkyl or aryl silicones, so that it becomes possible to improve upon the pure types in this respect. Such improvement in strength is obtained without sacrifice of other desirable properties, and therefore the alkyl-aryl copolymers often are more useful wherever strength and toughness are important. 

Different elastic properties, mechanical strength and toughness of the matrix and the inclusions... 

Boron nitride derived from the borazine oligomer has been successfully used to replace the carbonaceous matrix in carbon fiber/carbon matrix composites (C/C) [15,18]. The carbon fiber/boron nitride matrix composites (C/BN) exhibit improved oxidation resistance over the C/C. Excellent mechanical strength and toughness have also been observed in the C/BN. As shown in Figure 2.16, both the flexural strength and modulus of pitch carbon fiber/BN specimens actually increase with extended heat treatment [18]. 

Mechanical strength and toughness High abrasion resistance... 

Due to the unique arrangement of the two phases in an IPN, these materials often exhibit good mechanical strength and toughness. There have been literature reviews on the properties of semi-IPN polymers based on a rubber... 

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