Viscoelastic Properties of Mineral-Filled Poly(lactic acid) Composites

Table 1

Physical properties of the used mineral fillers.

Inorganic filler	Chemical formula	Density; (g/cm^3)	Mohs; hardness	Particle; shape	Surface area; BET (m^2/g)	pH
Mica SG^a	^dX2Y4-6Z8O20(OH,F)4	2.9	2.5	Platy	7	11
Natural Zeolite^b	(Ca,K2,Na2,Mg)4Al8Si40O96⋅24 H2O)	2.3	2	Blocky	13	7
Vansil^c	CaSiO3	2.9	4.5	Acicular	4	9

^aAspanger Bergbau und Mineralwerke.
^bIFA, Tulln, Austria.
^cVansil, C. H. Erbslöh.
^dX is K, Na, Ca, Ba, Rb or Cs; Y is Al, Mg, Fe, Mn Cr, Ti or Li; Z is Si, Al, Fe³⁺ or Ti.