Effe ct of nan oclay particles on th e hardne ss strengt h of polyprop ylene/Ca nola straw flour co mposites

Envir onmentally friendly polymer com posite materials obtained from natural bio-de rived reinforcements have received considera ble attentio n during the recent past due to cost effectiveness and increased environment al awareness and ecological concerns. One o f the agricultural resid ues is canola straw wh ose cultivation had a considerable growth in Iran during the past de cade. The average stra w yield of canola reaches about ۳ d ry t/ha. It can be estima ted that abo ut ۵۰۰,۰۰۰ tons of can ola straw is produced in Iran annual ly and due to the gover nmental policies to supply edible o il, this amo unt will in crease in the future [۱]. It is intere sting to mention that canola straw h as no special industrial application. Large qua ntities of ca nola straw remain in the fields every year after harve sting. Amo ng the different nanoparticles, nanoclay is the most preferred one, owing to its hi gh aspect ratio (۱۰۰۱۰۰۰ ) and extrem ely high surface-to-volume rati o (۷۰۰-۸۰۰ m۲ g- ۱), which esta blish significant improvements for a variety of polymers at very low filler conte nts (less than ۵% by weight), far less than those using traditional micro n-scaled fill ers ( ۲۰ wt%)[۲].

کلیدواژه ها:

Nanoclay ، Polypr opylene ، Ha rdness test ، Extruder