Impact of Die Materials on the Effect of New Polymer Processing Aids for Sharkskin Properties  

作　　者：Seyed Pooyan Sajjadi Seyed Pooyan Sajjadi(Polymertechnik/Polymerphysik, Technische Universit at Berlin, Berlin, Germany)

机构地区：[1]Polymertechnik/Polymerphysik, Technische Universit at Berlin, Berlin, Germany

出　　处：《Journal of Materials Science and Chemical Engineering》2016年第9期17-27,共12页材料科学与化学工程（英文）

摘　　要：Flows of polymeric liquids undergo instabilities whose origins are quite different from those of Newtonian flows, due to their elastic character and the complexity of the fluid/solid boundary condition. One of these instabilities is well known as “shark-skin” which damages the surface appearance and properties of polymer extrudate while processing in blowmolding or piping, while it can be suppressed by employing various methods including coating the die surface and/or adding Polymer Processing Aid’s (PPA) to the polymer. In this article, the effect of various die materials on the properties of Polyethylene glycol (PEG) as a new type of PPA for suppressing the sharkskin phenomenon has been studied.Flows of polymeric liquids undergo instabilities whose origins are quite different from those of Newtonian flows, due to their elastic character and the complexity of the fluid/solid boundary condition. One of these instabilities is well known as “shark-skin” which damages the surface appearance and properties of polymer extrudate while processing in blowmolding or piping, while it can be suppressed by employing various methods including coating the die surface and/or adding Polymer Processing Aid’s (PPA) to the polymer. In this article, the effect of various die materials on the properties of Polyethylene glycol (PEG) as a new type of PPA for suppressing the sharkskin phenomenon has been studied.

关 键 词：Polymer Processing Aids (PPA) PEG SHARKSKIN Extrusion Instabilities 

分 类 号：O63[理学—高分子化学]