NDLI: Zinc stearate from galvanizing waste materials and its use as thermal stabilizer in PVC industries

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Zinc stearate from galvanizing waste materials and its use as thermal stabilizer in PVC industries

Content Provider	Semantic Scholar
Author	Rony, Fk Hoque, Ai Asaduzzaman, Mohammad Sultana, Shahin Nur, Husna Parvin Islam, S.
Copyright Year	2016
Abstract	Galvanizing industries of Bangladesh produce profuse amount of environmentally hazardous solid waste materials like zinc dross which contains significant amount of valuable zinc and harmful heavy lead. Zinc was extracted as zinc chloride (ZnCl 2 ) from zinc dross. Zinc stearate (ZnSt 2 ) samples were prepared by precipitation method from stearic acid, sodium hydroxide and ZnCl2 by varying the amount of the reagents and product yield found within the range 96.06-99.18%. Characteristic peaks of ZnSt 2 were investigated by Fourier Transform Infrared Spectroscopy (FTIR). Differential Scanning Calorimeter (DSC) onset curve assigned accurate melting point within the range 122.84-124.03 ° C. Surface morphology of ZnSt 2 was observed by Scanning Electron Microscope (SEM) and products had semi-crystalline structure. Thermal stability of ZnSt 2 was evaluated by Thermo-gravimetric Analyzer (TGA) that complied with literature. A combination of ZnSt2 and Calcium stearate (CaSt 2 ) at 1:1 ratio was used as thermal stabilizer in the powder commercial grade PVC resin and performed better thermal stability. The dehydrochlorination temperature of PVC with mixed stearates was 344.67±1.04 ° C for 10% (w/w) loading whereas for PVC, PVC with 10% (w/w) ZnSt 2 and PVC with 10% (w/w) CaSt 2 , it was 269.83±1.04 ° C, 317.33±1.26 ° C and 323.33±2.08 ° C respectively. Bangladesh J. Sci. Ind. Res. 51(4) , 261-270, 2016
Starting Page	261
Ending Page	270
Page Count	10
File Format	PDF HTM / HTML
DOI	10.3329/bjsir.v51i4.30443
Volume Number	51
Alternate Webpage(s)	https://www.banglajol.info/index.php/BJSIR/article/download/30443/20415
Alternate Webpage(s)	https://doi.org/10.3329/bjsir.v51i4.30443
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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