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Study on Preparation and Application of Polyacrylate/Nano-CaCO3 to Modify Poly （Vinyl Chloride） Nanocomposites

Author: MaZhiJun
Tutor: WuQiuFang；YangJingHui
School: East China University of Science and Technology
Course: Materials Science and Engineering
Keywords: Nano calcium carbonate Acrylic PVC Toughening Nanocomposites
CLC: TQ320.7
Type: Master's thesis
Year: 2011
Downloads: 130
Quote: 0
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Abstract


In this paper, to improve the dispersion of nano calcium carbonate in polyvinyl chloride ( PVC ) plastic substrate compatibility and interface structure point of view, research preparation of polyacrylate / nano calcium carbonate the composite toughening agent for PVC plastic toughening modified to study the toughening effect . In Chapter acrylate polymer emulsion polymer by emulsion Synthesis investigated the amount of initiator , reaction temperature, ratio of monomers for polyacrylate performance in order to determine the best polymerization of the polyacrylate processes. Polyacrylic resin emulsion prepared in the third chapter will be used for nano- calcium carbonate composite modified modified , identified by modified process conditions , by transmission electron microscopy , thermal analysis (TGA) , and particle size distribution test , infrared spectroscopy (IR), specific surface area ( BET ) test , sedimentation volume , value of oil and other methods were used to characterize the composite modifier . In the fourth chapter examines the process of the preparation of the compound modifier composition , structure , filler content , the matrix initial performance on the mechanical properties of PVC , investigation and analysis and modified nano calcium carbonate dispersed in the PVC matrix and cross-section microscopic morphology . The study results showed that the synthetic polyacrylic acid lipid average molecular weight of 2.0 × 105-2.0 × 106, and may control the glass transition temperature ( Tg ) . Polyacrylate / nano-calcium carbonate composite modifier to achieve the hydrophilic - lipophilic change . Compound modifier is added to the PVC material , a substantial increase in impact strength , polyacrylate composite modifier content of 10 % , PVC material impact strength up to 57kJ/m2 , while the bending modulus along with the added amount of compound modifier increased significantly increases the tensile strength decreased only slightly . Frozen sections can be observed to a composite modifier uniformly dispersed in the PVC matrix with improved substrate compatibility . The composite modifier cause large plastic deformation of the matrix , to absorb a lot of impact energy , SEM can be observed impact fracture fibrous roots like typical ductile fracture characteristics , a certain toughness PVC matrix composite toughening effect is remarkable , and can effectively utilization of improved nano calcium carbonate

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues > Products and testing
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