Abstract
Evaluation of efficienty of three substituted phenolic antioxidants viz. BHT, CAO-5 and AO-330, using three concentrations of each antioxidant, in isotactic and atactic polypropylene was done by using dynamic thermogravimetric analysis (TGr) and derivative thermogravimetry (DTG). BHT and AO-330 were found to be more effective in isotactic polypropylene while CAO-5 was more effective in atactic polypropylene. The rate of weight loss has been found to be high in stabilized polypropylene (atactic and isotactic) after inflection temperature as compared to unstabilized isotactic and atactic polypropylene. Stability of polypropylene (isotactic and atactic) was also found to be dependent on the number of phenolic functional groups present per antioxidant molecule, which was also observed from activation energy data.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
