Abstract
In order to study on the filler effects of xonotlite (6CaO. 65iO2. H2O; needle crystals) on polyvinyl chloride (PVC), mechanical properties, such as tensile strength, Young's modulus and impact strength were measured on the non plasticized PVC and plasticized PVC containing 10, 20 and 40 phr of xonotlite, respectively.
Two kinds of xonotlite of different crystal lengths were prepared by hydro-thermal treating of calcium oxide and natural silica powders, and blended into PVC. The sheets for test pieces were made from the compounds using mill and press.
The xonotlite showed superior reinforcing effects as compared with surface treated fine calcium carbonate on tensile strength and Young's modulus, but resulted in the drop of impact strength. Better reinforcing effects were obtained with small crystals rather than large crystals.
The handy method using triangular graph was offerred to evaluate the effects of filler on the mechanical properties of the resin.
