Triantou Marianna I, Tarantili Petroula A, Andreopoulos Andreas G
Laboratory of Polymer Technology, National Technical University of Athens, Athens, Greece
Laboratory of Polymer Technology, National Technical University of Athens, Athens, Greece.
Waste Manag Res. 2015 May;33(5):453-9. doi: 10.1177/0734242X15572183. Epub 2015 Mar 6.
In the present research, blending of polymers used in electrical and electronic equipment, i.e. acrylonitrile-butadiene-styrene terpolymer, polycarbonate and polypropylene, was performed in a twin-screw extruder, in order to explore the effect process parameters on the mixture properties, in an attempt to determine some characteristics of a fast and economical procedure for waste management. The addition of polycarbonate in acrylonitrile-butadiene-styrene terpolymer seemed to increase its thermal stability. Also, the addition of polypropylene in acrylonitrile-butadiene-styrene terpolymer facilitates its melt processing, whereas the addition of acrylonitrile-butadiene-styrene terpolymer in polypropylene improves its mechanical performance. Moreover, the upgrading of the above blends by incorporating 2 phr organically modified montmorillonite was investigated. The prepared nanocomposites exhibit greater tensile strength, elastic modulus and storage modulus, as well as higher melt viscosity, compared with the unreinforced blends. The incorporation of montmorillonite nanoplatelets in polycarbonate-rich acrylonitrile-butadiene-styrene terpolymer/polycarbonate blends turns the thermal degradation mechanism into a two-stage process. Alternatively to mechanical recycling, the energy recovery from the combustion of acrylonitrile-butadiene-styrene terpolymer/polycarbonate and acrylonitrile-butadiene-styrene terpolymer/polypropylene blends was recorded by measuring the gross calorific value. Comparing the investigated polymers, polypropylene presents the higher gross calorific value, followed by acrylonitrile-butadiene-styrene terpolymer and then polycarbonate. The above study allows a rough comparative evaluation of various methodologies for treating plastics from waste from electrical and electronic equipment.
在本研究中，对用于电气和电子设备的聚合物（即丙烯腈 - 丁二烯 - 苯乙烯三元共聚物、聚碳酸酯和聚丙烯）进行了双螺杆挤出机共混，以探索工艺参数对混合物性能的影响，试图确定一种快速且经济的废物管理程序的一些特性。在丙烯腈 - 丁二烯 - 苯乙烯三元共聚物中添加聚碳酸酯似乎提高了其热稳定性。此外，在丙烯腈 - 丁二烯 - 苯乙烯三元共聚物中添加聚丙烯有助于其熔体加工，而在聚丙烯中添加丙烯腈 - 丁二烯 - 苯乙烯三元共聚物则改善了其机械性能。此外，还研究了通过加入2份有机改性蒙脱土对上述共混物进行升级。与未增强的共混物相比，制备的纳米复合材料表现出更高的拉伸强度、弹性模量和储能模量，以及更高的熔体粘度。在富含聚碳酸酯的丙烯腈 - 丁二烯 - 苯乙烯三元共聚物/聚碳酸酯共混物中加入蒙脱土纳米片使热降解机理转变为两阶段过程。作为机械回收的替代方法，通过测量总热值记录了丙烯腈 - 丁二烯 - 苯乙烯三元共聚物/聚碳酸酯和丙烯腈 - 丁二烯 - 苯乙烯三元共聚物/聚丙烯共混物燃烧产生的能量回收。比较所研究的聚合物，聚丙烯的总热值最高，其次是丙烯腈 - 丁二烯 - 苯乙烯三元共聚物，然后是聚碳酸酯。上述研究对处理电气和电子设备废物中的塑料的各种方法进行了粗略的比较评估。
