5Asad Nasir, Tariq Yasin, Atif Islam. Thermo-Oxidative Degradation Behavior o f Recycled Polypropylene[J]. Journal of Applied PolymerScience, 2011, 119: 3315-3320.
6Krishna K Pandey, Tapani Vuorine. Comparative study of photodegradation of wood by a UV laser and a xenon light source[J]. Polymer Degradation and Stability, 2008, 93: 2138-2146.