Impact Properties of Composite Nylon6 Dispersed by Aluminum Metal Powders

Abstract

Composite polymers, which are Nylon6 matrix homogeneously dispersed with aluminum powders, are prepared. To evaluate the brittleness, Charpy impact values are obtained. Although an aluminum addition of 10 vol tremendously decreases the impact value, excess aluminum additions from 30 to 40 vol don't largely decrease the impact value. It is explained that cracks easily propagate through the interface between the aluminum powders and polymer matrix because of the weak interface.

High Electric Conductive PMMA Composites without Impact Value Decay by Dispersion of Copper Powder

“…Although the addition from 20 to 30 vol%Cu powder reduces the impact value from 6 to 3 kJm À2 , the impact values of the high electric conductive ABS-Cu composites with 20 to 30 vol%Cu is approximately 7 kJm À2 and is apparently higher than that of N6-Al composites (2 kJm À2 ) for use with practical exteriors in Japan. [1][2][3] The modulated impact value is higher than that of nylon6 composites with Al dispersion from 20 to 30 vol%.…”

“…However, the low impact value induced by the powder dispersion is a serious problem, because cracks easily propagate at the interface between nylon6 matrix and Al powders. 2,3) Both appropriate impact value and appropriate electric conductivity of copper powders ABS composites (ABS-Cu) have been found. 10) However, it is a serious problem for Cu addition to decrease the impact value of the high electric conductive composites in a predictable manner.…”

“…[1][2][3] The addition of electric conductive powders has enhanced the electric conductivity of insulators. Based on the percolation theory, 4,5) the critical volume fraction (threshold) from the insulator to the electric conductor is 16 AE 2 vol% in powder dispersed composites.…”

Impact Value of High Electric Conductive ABS Composites with Copper Powder Dispersion Prepared by Solution-Cast Method

“…However, the low impact value (2 kJm À2 ) is a serious problem, because cracks easily propagate at the interface between the nylon6 matrix and the Al powders. 2,3) On the other hand, it is difficult to prepare the composites samples with various volume fractions. To prepare the samples, the solution casting is a useful method.…”

“…[1][2][3] The addition of electric conductive powders has enhanced the electric conductivity of insulators. Based on the percolation theory, 4) the critical volume fraction (threshold) from the insulator to the electric conductor is 16þ=À2 vol% in powder dispersed composites.…”