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首页> 外文期刊>Journal of Vinyl & Additive Technology >Poly(vinyl chloride)-b-Poly(hydroxypropyl acrylate)-b-Poly(vinyl chloride): Understanding the Synthesis of an Amphiphilic PVC Block Copolymer on a Pilot Scale
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Poly(vinyl chloride)-b-Poly(hydroxypropyl acrylate)-b-Poly(vinyl chloride): Understanding the Synthesis of an Amphiphilic PVC Block Copolymer on a Pilot Scale

机译：聚（氯乙烯）-b-聚（丙烯酸羟丙酯）-b-聚（氯乙烯）：初步了解两亲PVC嵌段共聚物的合成

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The aim of this work was to develop an understanding of the major difficulties associated with the scale-up of the technology for the synthesis of poly(vinyl chloride) (PVC) block copolymers that contain hydrophilic segments, thus providing important directions to be followed in order to produce such new materials on the industrial scale. The synthesis was carried out in a two-step process. First, the macroinitiator α,ω-di(iodo)-poly(hydroxypropyl acrylate) was synthesized in an aqueous medium by (single electron transfer)/(degen-erative chain transfer) living radical polymerization (SET-DTRP) catalyzed by Na2S2O4. The block copolymer was then prepared by SET-DTRP of vinyl chloride (VC) from the iodine-terminal active chain ends of the macroinitiator, thereby leading to the formation of the block copolymer poly(vinyl chloride)-b-poly(hydroxy-propyl acrylate)-b-poty(vinyl chloride). This report covers important aspects related to the characterization of the block copolymer produced and to the identification of the major limitations that must be overcome in order to produce this new material on the industrial scale. The results clearly show the differences between the theoretical predictions and the block copolymer compositions obtained by using a suspension polymerization method, which is the most-used polymerization process in the PVC industry.
机译：这项工作的目的是了解与规模化合成包含亲水性链段的聚氯乙烯（PVC）嵌段共聚物的技术有关的主要困难，从而提供了重要的发展方向。为了在工业规模上生产这种新材料。合成过程分两步进行。首先，通过Na 2 S 2 O 4催化的（单电子转移）/（负-负链转移）活性自由基聚合（SET-DTRP），在水性介质中合成大分子引发剂α，ω-二（碘）-聚丙烯酸羟丙酯。然后通过SET-DTRP从大分子引发剂的碘末端活性链末端通过氯乙烯（VC）制备嵌段共聚物，从而导致形成嵌段共聚物聚（氯乙烯）-b-聚（羟基-丙基）。丙烯酸）-b-poty（氯乙烯）。该报告涵盖了与生产的嵌段共聚物的表征有关的重要方面，以及与以工业规模生产这种新材料所必须克服的主要局限性有关的鉴定。结果清楚地表明了理论预测值与通过使用悬浮聚合方法获得的嵌段共聚物组成之间的差异，该方法是PVC工业中最常用的聚合方法。

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