IMPROVING THE BIODEGRADABILITY AND MECHANICAL STRENGTH OF CORN STARCH-LDPE 
BLENDS THROUGH FORMULATION MODIFICATION

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NIKAZAR M.; MILANI Z.; SAFARI B.; BONAKDARPOUR B.

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Journal Paper

Paper Information

Journal: Iranian Polymer Journal Year:2005 | Volume:14 | Issue:12 (66) Page(s): 1050-1057

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Information Journal Paper

Title

IMPROVING THE BIODEGRADABILITY AND MECHANICAL STRENGTH OF CORN STARCH-LDPE BLENDS THROUGH FORMULATION MODIFICATION

Author(s)

NIKAZAR M. | MILANI Z. | SAFARI B. | BONAKDARPOUR B. | Issue Writer Certificate

Keywords

POLYETHYLENE

STARCH

BIODEGRADABLE

PENICILLIUM FUNICULOSUM

Abstract

Six corn STARCH-LDPE film blends containing STARCH in the range 5-40% by weight, oleic acid as a Lewis catalyst with concentration of either 5% or 10%, maleic anhydride as a coupling agent with concentration of either 2% or 10% and benzoyl peroxide as free radical initiator with concentration of either 0.1% or 0.25% were prepared. Fungal growth tests (ASTM G21) using PENICILLIUM FUNICULOSUM were carried out on the samples made according the above formulations. Tensile tests (ASTM D638) and SEM imaging were also carried out on the samples before and after incubation with PENICILLIUM FUNICULOSUM for three weeks. The results of ASTM G21 test and SEM imaging showed that the increase in STARCH content from 5% to 40% in the formulations containing all three additive increases the biodegradability of the samples whereas increase in the concentration of oleic acid from 5% to 10% has an opposite effect. Formulations containing only 5% STARCH with a fairly high concentration of additives or 40% STARCH with no additives supported none or very little growth after three weeks, which indicates the importance of the concentration of STARCH and the presence of additives on the biodegradability of STARCH - LDPE film blends. Tensile test results showed that increase in STARCH content in the range of 2-30% leads to a decrease in the values of the tensile strength and increase in the values of the elongation-at-break whereas further increase up to 40% has the opposite effect. Tests with blends containing 40% STARCH and no additive or 5% STARCH with a fairly high concentration of additives resulted in low yield stresses and high elongation-at-break. Increase the concentration of oleic acid from 5% to 10% in the blends resulted in a decrease in both the yield stress and elongation-at-break.

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APA: Copy

NIKAZAR, M., MILANI, Z., SAFARI, B., & BONAKDARPOUR, B.. (2005). IMPROVING THE BIODEGRADABILITY AND MECHANICAL STRENGTH OF CORN STARCH-LDPE BLENDS THROUGH FORMULATION MODIFICATION . IRANIAN POLYMER JOURNAL (ENGLISH), 14(12 (66)), 1050-1057. SID. https://sid.ir/paper/535572/en

Vancouver: Copy

NIKAZAR M., MILANI Z., SAFARI B., BONAKDARPOUR B.. IMPROVING THE BIODEGRADABILITY AND MECHANICAL STRENGTH OF CORN STARCH-LDPE BLENDS THROUGH FORMULATION MODIFICATION . IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2005;14(12 (66)):1050-1057. Available from: https://sid.ir/paper/535572/en

IEEE: Copy

M. NIKAZAR, Z. MILANI, B. SAFARI, and B. BONAKDARPOUR, “IMPROVING THE BIODEGRADABILITY AND MECHANICAL STRENGTH OF CORN STARCH-LDPE BLENDS THROUGH FORMULATION MODIFICATION ,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 14, no. 12 (66), pp. 1050–1057, 2005, [Online]. Available: https://sid.ir/paper/535572/en

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