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The effect of small amounts of calcium carbonate on mechanical properties of rigid PVC
Author(s) -
Bystedt Jan,
Erlandsson AnnMarie,
Enequist Bengt,
Josefsson Christina
Publication year - 1987
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730090311
Subject(s) - calcium carbonate , filler (materials) , carbonate , materials science , calcium , particle size , composite material , drop (telecommunication) , izod impact strength test , mineralogy , chemistry , metallurgy , telecommunications , computer science , ultimate tensile strength
The effect of calcium carbonate in levels of 1 to 5 phr has been studied. Two types of calcium carbonate with an average particle size of 1 and 3 microns have been tested and for each formulation a graph has been drawn with drop impact strength as a function of mechanical processing at constant melt temperature. The maximum impact strength has been read from the graph. The results show that the content of calcium carbonate has an obvious effect on impact strength and that the effect of the fine‐grained filler is clearly positive and that the effect of the coarse‐grained filler is slightly negative. Resistance to internal pressure has been studied only at a filler level of 3 phr. Here the fine‐grained calcium carbonate gives a better result than the coarse‐grained one at a moderate level of mechanical processing, while the two filler‐types are equivalent at high levels of mechanical processing.