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首页> 外文会议>Annual technical conference of the Society of Plastics Engineers;ANTEC 2012 >HYDROLYTIC DEPOLYMERIZATION OF PET DURING EXTRUSION
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HYDROLYTIC DEPOLYMERIZATION OF PET DURING EXTRUSION

机译：挤出过程中PET的水解脱聚

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Depolymerization of PET to high molecular weight oligomers could introduce opportunities to re-use PET waste via chemical recycling. Hydrolysis of PET in the presence of water/steam was carried out in a twin screw extruder, at barrel temperatures of 265°C and 300°C with screw speeds of 20, 60 and 200 rpm. The extruded products were characterized to determine intrinsic viscosity (IV) of samples as well as thermal properties (DSC) and rheological behavior. Proton nuclear magnetic resonance (HNMR) analysis was used to estimate carboxyl end group content. The results showed that the average molecular weight (Mw) of extruded polymer was reduced to less than 10,000 g/mol.
机译：PET解聚为高分子量低聚物可能会带来通过化学回收再利用PET废料的机会。在水/蒸汽存在下，在双螺杆挤出机中，在265℃和300℃的机筒温度下以20、60和200rpm的螺杆速度进行PET的水解。对挤出产品进行表征，以确定样品的特性粘度（IV）以及热性能（DSC）和流变行为。质子核磁共振（HNMR）分析用于估计羧基端基含量。结果表明，挤出聚合物的平均分子量（Mw）降低到小于10,000g / mol。

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