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Study on Properties of Modified and Filled HDPE with Talc Etc

Author: LiWenLian
Tutor: WangZhengXiang；JiangQiBin
School: Hunan University
Course: Materials Science
Keywords: Talcum powder Calcium carbonate Wollastonite Complex Total composite
CLC: TQ325.12
Type: Master's thesis
Year: 2010
Downloads: 162
Quote: 0
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Abstract


In this thesis, the main contents include: talc, wollastonite, calcium carbonate three inorganic filler surface modification treatment preparation HDPE composite and its total composite, and its properties were characterized. Fillers such as talc the surface modification treatment, the modification effect was evaluated by contact angle, the activation rate, oil absorption, and other methods. Modified fillers distilled water contact angle significantly larger decline in oil absorption, the basic rate of activation increases with the increase of the coupling agent. These results indicate that the coupling treatment to change the polarity of the surface of talc, etc., and the surface thereof from hydrophilic to hydrophobic. Infrared spectroscopy to explore the mechanism of surface modification by acetone extraction modified filler 2850cm-1 and persists coupling agent peaks at 2920cm-1, indicating the presence of a bond between the coupling agent and filler surface cooperation with . The surface modification treatment of the inorganic filler is more play its role, the oil absorption amount of the modified filler powders reduced, the filler can reduce the adsorption of plasticizer, to reduce costs. By melt blending process, the inorganic filler such as talc is added to the HDPE base resin to prepare a composite material filled HDPE. On the performance of composite materials, and obtained the following conclusion: talc, wollastonite, and calcium carbonate after coupling agent activation, improve the compatibility with the matrix resin of HDPE, compared with the un-activated inorganic powders, significantly improve the composite performance; in heat resistance and anti-aging properties: different kinds of inorganic powder in varying degrees to improve the heat resistance and anti-aging properties of the composite system; mechanical properties: HDPE / talc composite system , the tensile strength with the increase of the talc content is increased but the impact strength with a larger drop, and the added amount, and talc; HDPE / wollastonite composite system, the notched Izod impact increasing intensity wollastonite content increases, while the tensile strength of the overall system with the increase of the content thereof decreased; for HDPE / calcium carbonate composite system, the system notched impact strength with the increase in calcium carbonate content substantially increased, while the tensile strength almost linearly decreased with the increasing amount of the modified calcium carbonate. Inorganic combination of particle synergies enhance the toughening of HDPE ideas common composite study three typical talc, wollastonite, calcium carbonate inorganic powder and HDPE resins with different shape characteristics of the object system. The results showed that can simultaneously play the advantage of two kinds of inorganic powder having a different shape, so that the total composite system only has a high tensile strength, and also has good impact toughness.

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Polymer resin and plastic > Polyolefin plastic > Polyethylene
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