Fiber tensile properties irradiation

H. Zhang, J. Zhang, J. Chen, X. Hao, S. Wang, X. Feng, and Y. Guo. Effects of solar uv irradiation on the tensile properties and structure of PPTA fiber. Polym. Degrad. StabiL, 91(ll) 2761-2767, November 2006. 

Radiation vulcanization of carbon fiber reinforced styrene-butadiene rubber causes a substantial increase in crosslink density (Figure 11.4) and tensile strength (Figure 11.5). This magnitude of change is possible only when the interaction between the filler and the matrix is improved. When irradiated in the presence of air, carbon fibers gain functionality which substantially increases their adhesion resulting in a spectacular improvement in properties. SEM studies show that as the dose of radiation increases, the adhesion of the... 

Several polymers combine excellent ultraviolet resistance with good tensile and elongation at break properties (Table 11.3). The storage modulus, alpha relaxation, and creep in polymers are influenced by electron irradiation. Thus, the creep of some polymers increased upon exposure to electron beam irradiation below 4 Mrad. Neutron/gamma irradiation also had an adverse effect on some polymer properties. Thus, some glass fiber-reinforced plastics lose 20%-40% of their flexural strength after exposure to neutron/gamma irradiation doses above 1 x 10 Gy [3]. 

However, increasing cellulose fiber content and time of photo-irradiation led to decreasing elongation (%) values. Other research on the use of thermoplastic starch without further modification (i.e., changes in experimental conditions) include the work of Lu et al. (2006), Ma et al. (2007), Fama et al. (2009), Kaushik et al.(2010), Liu et al. (2010), Guimaraes et al. (2010), and Kaith et al. (2010). These studies show a significant increase in tensile and thermal properties of thermoplastic starch when the matrix reinforced with nanofibers. 

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