Calculation of the microstructure of products of homogeneous chlorination of polyvinyl chloride

Brun, Ye.B.; Povolotskaya, Ye.S.

doi:10.1016/0032-3950(83)90070-9

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…The radiation time improves the peak reaction rate, but its influence becomes weaker when the time is longer than 40 s. The reaction temperature promotes the peak chlorination rate and the reaction after initiation. This phenomenon can be explained by the free radical mechanism [26][27][28], which assumes that the radical substitution is a chain reaction and composed of initiation (Reaction 3), propagation (Reactions 4 and 5), and termination (Reaction 6). A chlorine radical is generated in Reaction 3 and would participate in the chain propagation causing the substitution.…”

Section: Enhancement Effect Of One Single Uv Initiationmentioning

confidence: 99%

UV‐Enhanced Gas‐Solid Chlorination of Polyvinyl Chloride for Cleaner Production of Chlorinated Polyvinyl Chloride

et al. 2016

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A vibrated-bed reactor with an online UV-Vis measuring system was established in order to reveal the dynamic process of UV-enhanced chlorination of polyvinyl chloride (PVC). Influences of temperature, radiation time, and interval time of intermittent initiation on chlorination process as well as the overlapping enhanced effect of adjacent UV radiations were analyzed. By properly controlling the intermittent UV radiation, one can obtain a considerable steady reaction rate during the chlorination process to avoid the temperature runaway due to over-accelerated reaction. Solid-state nuclear magnetic resonance identified the microstructure change of chlorinated PVC particles. The whiteness value after thermal aging was determined to uncover the relationship between thermal stability and doublebond content, where the results accorded with the related theory on polymer dehydrochlorination.

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Section: Enhancement Effect Of One Single Uv Initiationmentioning

confidence: 99%