Preparation and Properties of Reversible Thermochromic PP Special Materials

doi:10.19491/j.issn.1001-9278.2020.11.004

Abstract

Abstract:

The reversible thermochromic polypropylene （PP） special materials were prepared by a two-step method. A master batch based on poly（ethylene-1-octene）（POE） and reversible thermochromic powder was first prepared by a miniature twin-screw extruder. The reversible thermochromic PP special materials were then prepared by melt blending PP with the resulting master batch. The effect of master batch content on the reversible thermochromic property， mechanical properties， thermal properties and microstructure of the prepared special materials were investigated. The results indicated that the reversible thermochromic powders were finely dispersed in the PP matrix because of the good compatibility between POE and PP matrix. The PP special materials exhibited an excellent reversible thermochromic property and high notched impact strength.

Key words: polypropylene special material, masterbatch, reversible thermochromic powder, reversible thermochromic

CLC Number:

TQ325.1⁺4

YU Yang, ZHAO Xinyu, HU Fuqiang, LIU Hai. Preparation and Properties of Reversible Thermochromic PP Special Materials[J]. China Plastics, 2020, 34(11): 19-22.

Figures/Tables 5

Fig.1. The color?changed process of the reversible thermochromic PP special materials at different environmental temperature

Fig.2. The tensile strength and elongation at break of the reversible thermochromic PP special materials

Fig.3. The notched impact strength of the reversible thermochromic PP special materials

Fig.4. DSC and TG curves of the reversible thermochromic PP special materials

Fig.5. The cross?section SEM of the reversible thermochromic PP special materials

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