7177

6683

كارشناسي ارشد

صنايع پليمر

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي

1390

چهارده، 92ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

سعيد نوري خراساني

7/8/91

مرتضي صادقي، طيبه بهزاد

1396/09/20

كتابنامه

مهندسي شيمي

مهندسي شيمي

ID6683

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Investigating the Effect of Nanoclay and Photostabilizer on Properties of Pistachio Shell Flour Plastic Composite HDPE Hybrid Fillers Mohammad Ali Abedini Najafabadi MA Abedininajafabadi@ce iut ac ir Date of Submission 2012 03 05 Department of Chemical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor S Nouri Khorasani saied@cc iut ac irAbstractDramatic advances in the development of wood plastic composites WPC have germinated a great deal of researchin this promising field Using agricultural wastages as filler has a great deal of importance in providing wood plasticcomposite In the present study the 40 wt pistachio shell flour is used as a filler of high density polyethylenematrix An attempt is made to investigate the effect of such factors as nanoclay cloisite 20A and photo stabilizerson tensile impact color fading and weathering Characteristic To achieve this aim nanoclay cloisite 20A at levelsof 0 3 6 Phc titanium dioxide Tio2 as a photostabilizer at levels of 0 2 4 Phc and hindered amine light stabilizer HALS at levels of 0 0 25 0 5 Phc were analyzed According to Taguchi s L9 orthogonal array nine compoundswere selected Compounds using a melt blending two step process in a laboratory twin screw extruder wereprepared The specimens of tensile and impact tests prepared using an injection molding machine From results oftensile and impact tests the No 5 specimens were the best consisting 3 Phc nanoclay 2 Phc Tio2 and 0 5 PhcHALS Samples of No 5 were placed in Q Panel as well as control samples which was without any nanoclay andphotostabilizer The weathering condition was implemented for 1500 hours Color measurement and tensile testswere done in interval of 250 500 1000 and 1500 hours The finding revealed that the nanocaly cloisite 20A hadacted as a reinforcing agent and increasing nanocaly from 0 to 3 Phc caused 27 increase in tensile strength and11 increase in tensile modulus Inappropriate distribution achieved as a result of increasing nanoclay from 3 to 6Phc made a 4 deduction in tensile strength Increasing nanoclay from 0 to 6 Phc caused 10 reduction in impactstrength of pistachio shell flour plastic composite At 6 Phc nanoclay the reinforcing effect of nanoclay is reducedprobably due to agglomeration of nanoclay and increasing the ratio of intercalated structure to exfoliated structure After 250 hours of weathering test the tensile strength of control and No 5 samples increased By following theexposure time the tensile strength of control sample reduced but in the meantime the N0 5 samples strengthremained almost stable A change in total color difference E of composite consisting photostabilizer is from theinitial 11 4 to 13 5 after 1500 h while E of control sample changed from 7 to 38 The color change of No 5 samplewas much less than control sample and it was acceptable too The water spray had a high effect on color fading ofpistachio shell flour plastic composite Adding photostabilizer has a definite affection on preventing pistachio shellflour plastic composite characteristic decrease Finally X ray diffraction XRD data reflected that intercalated andsemi exfoliated structures were developed in the fabricated sample under study Keywords Wood Plastic Composite WPC pistachio shell flour physical properties colormeasurement weathering test nanoclay

سعيد نوري خراساني

مرتضي صادقي، طيبه بهزاد