Better Color and Thermal Stability of Suspension PVC Produced on an Industrial Scale by the Continuous Initiator Dosing Technology,Industrial & Engineering Chemistry Research

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Better Color and Thermal Stability of Suspension PVC Produced on an Industrial Scale by the Continuous Initiator Dosing Technology
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-10-19 , DOI: 10.1021/acs.iecr.1c02846
Manuel Tierno ₁ , Belén Pascual ₁ , Jose Ignacio Conde ₁ , Guillermo Badillo ₁ , André H. Hogt ₂ , Koen Vanduffel ₂ , M. Itxaso Calafel ₃ , Antxon Santamaría ₃

Affiliation

Polyvinyl chloride (PVC) resins obtained by the continuous initiator dosing (CiD) technology and produced on an industrial scale show improved color and thermal stability, as compared with conventional PVC. The thermal stability of the PVC resins was characterized by the dehydrochlorination test, static thermal aging test, and thermogravimetry, while the color was evaluated by spectrophotometric measurements. It could be assumed that the better properties of the CiD PVC resin are ascribed to a slightly lower level of polymer chain defects, but our NMR results are not conclusive in this respect. Hydrogen bond strengths of the radicals generated by the organic peroxide initiators used in CiD and conventional PVC polymerizations were compared with the hydrogen bond dissociation energy of the PVC chain. The lower residual amount of initiator in the CiD PVC resin and practically the energetic inability of its radicals to abstract hydrogen from the PVC chain were considered to be the cause of the better color and thermal stability of the resin.

中文翻译：

通过连续引发剂计量技术在工业规模上生产的悬浮 PVC 具有更好的颜色和热稳定性

与传统 PVC 相比，通过连续引发剂计量 (CiD) 技术获得并以工业规模生产的聚氯乙烯 (PVC) 树脂显示出更好的颜色和热稳定性。PVC树脂的热稳定性通过脱氯化氢试验、静态热老化试验和热重法表征，而颜色通过分光光度法测量评价。可以假设 CiD PVC 树脂的更好性能归因于聚合物链缺陷水平略低，但我们的 NMR 结果在这方面并不是决定性的。将 CiD 和常规 PVC 聚合中使用的有机过氧化物引发剂产生的自由基的氢键强度与 PVC 链的氢键解离能进行了比较。

更新日期：2021-11-03

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