Influence of butadiene/styrene copolymers on the modification of polypropylene in electron beam irradiation

Development of a Thermoplastic Olefin Blend Embo-Pattern Sheet Cross-linked by Electron Beam Irradiation for Luxurious Automotive Interior Parts

“…For example, decomposition is faster than combination in PP (polypropylene) and it suffers structural destruction during cross-linking by the electron beam. PE (polyethylene), on the other hand, suffers faster combination than decomposition and its degree of cross-linking differs not by PE type, but by the conditions of the electron beam irradiation, such as temperature and dose [11,12,[15][16][17][18] . The advantages of cross-linking by electron beam irradiation include cross-linking at room temperature and a short reaction period, which reduces the manufacturing time, and it generates fewer impurities from mixture materials or other disassemblies, because the polymers can be cross-linked in the solid state [13,14] .…”

“…In particular, cross-linking using electron beam irradiation can readily improve several polymer properties (such as thermal stability) [11][12][13][14][15][16][17] and cross-link solid polymers like gamma ray irradiation and ultraviolet light irradiation [13] . However, it has a shorter period and a larger irradiation depth than other irradiations [13] .…”

“…And also compare to grafting method, it is clean, highly efficient, and easy in operation [13,14] . The end result is outstanding mechanical properties at both low and high temperatures, very high chemical resistance, intensity, and heat resistance, all of which make electron beam cross-linking technology highly effective in cross-linking solid sheets applied to automotive skin materials [11][12][13][14][15][16][17] .…”

“…Polymer cross-linking is a technology conducive to improving material properties (such as hardness, Young's modulus, heat resistance, and solvent resistance) [11][12][13][14][15][16][17], and processability [13,14] . In particular, cross-linking using electron beam irradiation can readily improve several polymer properties (such as thermal stability) [11][12][13][14][15][16][17] and cross-link solid polymers like gamma ray irradiation and ultraviolet light irradiation [13] .…”

Crystalline structure of polypropylene in blends with thermoplastic elastomers after electron beam irradiation

“…This dose is slightly larger than that recommended for medical equipment sterilization, which should not change the crystalline structure of PP. According to literature data (Yoshii et al, 1995;Ż uchowska, 1988;Ż uchowska et al, 2003) macroradicals in irradiated PP have a long life time reaching a few months. Hence, the degradation and/or crosslinking proceeds even if the radiation action has finished.…”