Low-Density Polybutylene Terephthalate Foams with Enhanced Compressive Strength via a Reactive-Extrusion Process.

摘要: Due to their appealing properties such as high-temperature dimensional stability, chemical resistance, compressive strength and recyclability, new-generation foams based on engineering thermoplastics polyethylene terephthalate (PET) polybutylene (PBT) have been gaining significant attention. Achieving low-density without sacrificing the mechanical is of vital importance for applications in field transportation construction, where sufficient desired. In contrast numerous research studies PET foams, only a limited number PBT particular, extruded are known. Here we present novel route with densities low 80 kg/m3 simultaneously improved manufactured by tandem reactive-extrusion process. Improved rheological therefore process stability were achieved using two selected 1,3,5-benzene-trisamides (BTA1 BTA2), which able form supramolecular nanofibers melt upon cooling. With 0.08 wt % BTA1 0.02 BTA2 normalized was increased 28% 15%, respectively. This improvement assigned intrinsic reinforcing effect BTA fibers cell walls struts.