| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
The vast amount of plastic materials used for packaging requires sophisticated solutions for recycling. Especially for polyolefins, feedstock recycling is a viable option. Catalysts can reduce the reaction temperature and control the product spectrum. In this research, polyethylene (PE) was degraded using a Ziegler-Natta catalyst system for the enhancement of monomer recovery. The catalyst consisted of TiCl4 on activated alumina. The catalyst was mixed with PE and the degradation was investigated by various methods.
Investigation by thermogravimetry (TGA) and pyrolysis coupled with mass-spectroscopy (Pyro-MS) showed a significant reduction of the degradation temperature from 470 °C for sole PE to 400 °C in the presence of TiCl4. Pyro-MS and experiments in a quartz glass reactor showed the presence of alkanes and alkenes, but the absence of dienes. At 450 °C, the triplet product structure typical for PE was not observed. Main obstacle was the rapid deactivation of the catalyst.
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