• influences of particle sizes and contents of chemical blowing agents on foaming wood plastic composites prepared from poly(vinyl chloride) and rice hull

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 425
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this research aims to investigate the effects of chemical blowing agent (cba) contents and particle sizes on the properties of foamed poly(vinyl chloride) (pvc)/rice hull (rh) composites. fine particles of azodicarbonamide (ac) at 5, 8, 11 and 22 μm were modified with 20% by weight of zno and used at 0–3.0% by weight. the average cell size and density of the pvc/rh foamed profiles were reduced as the content of modified azodicarbonamide (mac) increased. larger mac particles lowered the density more effectively. maximum reduction of density by 46% was achieved when mac 22 μm was applied at 2.0% by weight. larger blowing particles led to pvc/rh foam with greater flexural modulus and strength. greater impact strength, observed when 5 μm mac was applied, resulted from the rather thick cell wall created abundantly when fine mac was applied.

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