| 초록 |
Thermoformability, smooth surfaces, gauge uniformity, and aesthetics make cross-linked polyolefins uniquely qualified for automotive, construction, sports and leisure markets. However, these cross-linked foams are not easy to recycle leading to unfriendly environmental protection. And also, chemically cross-linked foams are usually accompanied by undesirable odors. Development of nanocomposite foams is one of the latest evolutionary technologies of polymeric foam. Nanoparticles of extremely fine dimensions, high aspect ratio and large surface area can serve as nucleation agents for bubble generation and provide significant nucleation efficiency offering opportunity for foams to have lower cell size and higher cell number. This can decrease the material density while maintaining the essential mechanical properties. More important, nanoparticles are especially beneficial for enforcing foam materials considering the thickness of cell walls is very thin. In this study, we attempt to prepare ethylene-vinyl acetate(EVA)/montmorillonite(MMT) nanocomposite foams using chemical blowing agent and much lower dose of dicumyl peroxide(DCP) while having improved qualities compared to traditionally cross-linked EVA foams . |
