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| Author(s): |
Glauber Jose Turolla Fernandes
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) |
| Defense date: | 2000-03-10 |
| Examining board members: |
Jivaldo do Rosario Matos;
Afonso Rodrigues de Aquino;
Luiz Henrique Catalani
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| Advisor: | Jivaldo do Rosario Matos |
| Abstract | |
Degradation of waste synthetic polymers has been the focus of increased attention because of their potential use as fuels or chemical resource. Besides, recycling of polymers from waste products can contribute to solve pollution problems. The use of suitable catalysts can enhance the thermal degradation of synthetic polymers, which may be monitored by thermoanalytical techniques. In this study, catalysts with zeolite structure (Zeolite HY and SAPO-37 silicoaluminophosphate) were synthesized and characterized, in order to be screened up for the thermal degradation of high density polyethylene (HDPE). Catalytical activity was evaluated for these materiais using thermogravimetry (TG), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). Kinetic parameters related to the HDPE thermal degradation process with and without catalyst were calculated employing the multiple heating rate integral method proposed by Flynn and Wall as well by using Vyazovkin (Model Free Kinetics). AII the evolved products were analyzed using a TG/DTA-GC/MS simul and coupled system. The data showed a positive catalytic activity for the zeolite structure materials. (AU) | |