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pps proceeding
Symposium: S08 - (General Session 8) Polymer Nanostructures & Nanocomposites
Oral Presentation
 
 

Preparation of Polymer/Layered-materials Nanocomposites though Solid State Shear Compounding Technology

LI Kanshe (1)*

(1) Xi’an University of Science and Technology - Shaanxi - China

Solid state shear compounding technology (S3C) based on pan-milling is an effective method to prepare polymer/layered-materials nanocomposites. Kaolin/PVC and Kaolin/PVC/TPU nanocomposites were prepared through S3C. XRD, SEM and TEM verified that S3C based on pan-milling realized synchronously pulverizing, dispersion and compounding of PVC with kaolin. Through 25~30 cycles pan -milling, PVC and Kaolin powders imbedded each other and made into uniform PVC/Kaolin compounding powders and nanocomposites. The strip flake of Kaolin particles with thickness less than 30 nanometer and the aspect ratio of 10 times dispersed homogeneously in the PVC matrix. The mechanical properties of Kaolin/PVC and Kaolin/PVC/TPU nanocomposites prepared through S3C based on pan-milling 30 cycles at ambient temperature including elongation, tensile strength and notched impact strength were remarkably improved compared with conventional filled composites. The expanded graphite (EG) was prepared by microwave irradiation, EG-CPE-PVC co-powders were prepared through S3C with EG, chlorinated polyethylene (CPE) and PVC. The co-powders were then mixed homogeneous with PVC, thermal stabilizer and plasticizer. And the graphene-like/CPE-PVC composites were obtained by plastification and molding. XRD, AFM, TEM and SEM verified that S3C can realize pulverizing, dispersion, exfoliation of EG layer and compounding of EG-CPE-PVC. Furthermore, the addition of CPE realize the further exfoliation of EG, which makes the EG thickness reaches to 1-3 layers and achieves the goal of transforming EG to grapheme. When the EG mass fraction reaches 3%, compared with PVC the conductivity of graphene-like/CPE-PVC composites increases 8 orders of magnitude, while EG mass fraction is over 4 %, the conductivity surges again and appears the percolation phenomenon. When the EG mass fraction reaches 5%, the conductivity is up to 0.01 S/m, and the composites show good antistatic property.