| Autor: |
Lee, Eun Ju, Park, Hee Jung, Kim, Se Mi, Lee, Kee Yoon |
| Zdroj: |
Macromolecular Research; Apr2018, Vol. 26 Issue 4, p322-331, 10p |
| Abstrakt: |
Free radical polymerization of methyl methacrylate was investigated in the presence of azo and organic peroxide initiator, such as 2,2′-azobisisobutyronitrile (AIBN), 1,1-bis(tert-butylperoxy)cyclohexane (BTBPC), tert-butyl peroxyneodecanoate (TBPND), and tert-butyl peroxy-2-ethylhexanoate (TBPEH) under isothermal condition (Tiso=60∼90 °C). The reaction heat generated in the bulk polymerization of methyl methacrylate was measured using a differential scanning calorimeter (DSC). The degree of polymerization and its reaction rate were expressed as a function of conversion (α) and its rate (dα/dt), respectively. We confirmed that autoacceleration proceeded predominantly during the autoacceleration regime (τauto) appearing after the onset of autoacceleration of MMA polymerization. In this work, kinetic models consisting of two contributions, such as nth order reaction and a kinetic equation representing autoacceleration, were suggested. The combined kinetic models were simulated and compared with the experimental data to evaluate the reliabilities.![]() [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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