中国塑料 ›› 2009, Vol. 23 ›› Issue (02): 84-87 .DOI: 10.19491/j.issn.1001-9278.2009.02.019

• 塑料与环境 • 上一篇    下一篇

回收饮料瓶片含水量对PET扩链反应的影响

王益龙,尚琳琳,黄明,沈泽洋,胡文颢   

  1. 1--大连理工大学化工学院高分子材料系, 2--大连理工大学科技园有限公司
  • 收稿日期:2008-11-18 修回日期:1900-01-01 出版日期:2009-02-26 发布日期:2009-02-26

Effect of Water Content in Recycled Drink Bottle Flakes on PET Chain Extending Reaction

WANG Yi-long, SHANG Lin-lin, HUANG Ming, SHENG Zhe-yang, HU Wen-hao   

  1. 1-Polymer Materials Dept, 2-Science Park Co. Ltd, Dalian University of Technology, Dalian116012, China
  • Received:2008-11-18 Revised:1900-01-01 Online:2009-02-26 Published:2009-02-26
  • Contact: WANG Yi-long

摘要: 分别使用Φ30反应挤出机和相同螺杆结构的Φ90反应挤出机研究了饮料瓶片中含水量对挤出产物特性黏度的影响。结果表明,在相同配方条件下,使用实验机生产出的对苯二甲酸乙二醇酯(PET)扩链产品的特性黏度比工业机生产出的低;使用工业机挤出含水量为2.5%的瓶片,产物特性黏度可达0.70dL/g以上,满足纺涤纶长丝的要求;当瓶片经干燥使含水量降至0.2%时,使用工业机可使产物的特性黏度达到0.82 dL/g,满足再次吹瓶的要求;经工业机挤出含水量为0.2%的瓶片和0.25%扩链剂均苯四甲酸二酐(PMDA),产物的特性黏度可以高达0.94 dL/g,达到重型包装用打包带料的标准。

关键词: 回收饮料瓶片, 挤出机, 聚对苯二甲酸乙二醇酯, 反应挤出, 扩链

Abstract: Recycled PET drink bottle flakes were extruded with 30(experiment) and 90(industry) extruders with a same screw structure in order to study the effect of water content of the flakes on the intrinsic viscosity of the product. It showed that the intrinsic viscosity of PET from experiment extruder is lower than that industry one. When water content in flakes was 2.5% and 0.2%, industry extruder resulted intrinsic viscosities of PET product of 0.70 and 0.82 dL/g, respectively. If pyromellitic dianhydride extender was used, the intrinsic viscosity obtained from industry extruder was increased to 0.94 dL/g.

Key words: recycled drink bottle flake, extruder, poly(ethylene terephthalate), reactive extrusion, chain extending reaction