Evaluation on the Thermal Stability and Hazards Behaviors of ADVN Using Green Thermal Analysis Approach

Abstract

ADVN (2,2'-Azobis (2,4-dimethyl) valeronitrile), a free radical initiator, is widely applied for the polymerization reaction of polymers in the chemical industries. When ADVN releases free radical during the decomposition process, it can accompany abundant heat and huge pressure to increase the possibility of thermal runaway and hazard, causing unacceptable thermal explosion or fire accidents. To develop an inherently safer process for ADVN, the thermal stability parameters of ADVN were obtained to investigate thermal decomposition characteristics using a DSC (differential scanning calorimetry) and TG (thermogravimetry). We used various kinetic models to completely depict the kinetic behavior and determine the thermal safety parameters for ADVN. The green thermal analysis approach could be used to substitute for complicated procedures and large-scale experiments of traditional thermal analysis methods, avoiding environmental pollution and energy depletion.

Evaluation on the Photosensitivity of 2,2′-Azobis(2,4-Dimethyl)Valeronitrile with UV

“…Since thermal stability involves three crucial factors of chemicals, including initial reaction, end reaction, and ratio for mass loss, IPDT was created based on different thermogravimetric regions of the TG curves. The equations of IPDT are as follows [23,24]:$IPDT=A°\times K°\times \left(T_f-T_i\right)+T_i$ $A°=\left(S1+S2\right)/\left(S1+S2+S3\right)$ $K°=\left(S1+S2\right)/\left(S1\right)$ where A ° and K ° is the proportion of mass loss. T i and T f are the mass loss at the initial temperature and final temperature, respectively.…”