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Synthetic magnesium silicate: A single‐component/multi‐functional modifier
Author(s) -
Varela Manuel A.,
Driscoll Stephen Burke,
Grolman Cory Peter,
Mehta Naresh R.
Publication year - 1986
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.730080307
Subject(s) - materials science , lubricant , rheometer , extrusion , magnesium , compaction , viscosity , thermal stability , plastics extrusion , silicate , viscoelasticity , composite material , polymer , chemical engineering , rheology , metallurgy , engineering
Recent laboratory and in‐production tests have indicated the attractive commercial properties of synthetic magnesium silicate in plastics processing. In addition to its enhancing the flow behavior/materials handling of the base powdered resin, such as PVC, it has also proved to be a valuable, yet inexpensive polymer modifier. This non‐abrasive single‐component additive has demonstrated clearly its multi‐functional capabilities. For example, when compounded (at 0.5 to 1.5 phr) in a standard rigid vinyl formulation, the synthetic magnesium silicate contributed to improved compaction in the extruder feed section, initiated a faster fusion time, reduced melt viscosity, and enhanced thermal stability. Laboratory torque rheometer numbers and ASTM D 4440 Rheometrics Dynamic Spectrometer viscoelastic behavior is included along with typical extrusion and physical property test data. The significance of the co‐stabilization was complemented by the enhancement of physical properties, reduction of the necessary amount of lubricant, and did not affect sample color and appearance.