writer：Dong Wanga,b, Gang Sunb,?, Liwei Yub
keywords：Recyclability of cellulose acetate butyrate (CAB) Thermal degradation activation energy Flow activation energy Thermoplastic nanofibers
source：期刊
Issue time：2012年
A high-throughput, controllable and environmentally benign fabrication process of thermoplastic
nanofibers with a biobased material, cellulose acetate butyrate (CAB) as the matrix was recently reported.
To prove the recyclability of the CAB, a method was proposed to theoretically demonstrate the ability
of the recycled polymer for repeated melt extrusions based on a comparison of thermal degradation
and flow activation energy of the recycled polymers. The flow activation energy was derived from rheological
behaviors of the original and recycled CAB at different temperatures. The thermogravimetric
analysis (TGA) was utilized to characterize the thermal degradation behaviors of the polymer. The change
in the number average molecular weight of the recycled CAB was studied by measuring the intrinsic
viscosity and the Mark-Houwink equation. To display the practical recyclability, the recycled CAB
was successfully employed to serve as the matrix for the preparation of iPP (polypropylene), PTT (poly
trimethylene terephthalate) and PE-co-GMA (poly (ethylene-co-glycidyl methacrylate)) nanofibers. The
proposed quantitative method could be extended to evaluate the recyclability of the other thermoplastics.