Rheological Behavior of Long-chain Branching Poly(lactic acid) Prepared via Electron Beam Irradiation

doi:10.19491/j.issn.1001-9278.2008.08.008

China Plastics ›› 2008, Vol. 22 ›› Issue (08): 36-40 .DOI: 10.19491/j.issn.1001-9278.2008.08.008

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Rheological Behavior of Long-chain Branching Poly(lactic acid) Prepared via Electron Beam Irradiation

ZHANG Wei，ZHANG Li一Ye

College of Materials Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Received:2008-05-12 Revised:1900-01-01 Online:2008-08-26 Published:2008-08-26

Abstract

Abstract: Long-chain branching poly(lactic acid)(PLA)was prepared via electron beam irradiation of linear PLA，whose rhcological behavior was characterized using dynamic shear testing.At low-frequency region，the long-chain branching PLAexhibited higher elastic shear modulus G} and lower loss angle
tangent tan } than the corresponding linear one. The melt strength increased with increasing content of bifunctional monomer (BDDA)and/or radiation dose. It also found that poly(L-lactic acid)(PLLA) was more sensitive to electron beam than poly (D一lactic acid)(PDLLA).

Key words: poly(lactic acid, irradiation, long-chain branching, rhcology

ZHANG Wei, ZHANG Li一Ye. Rheological Behavior of Long-chain Branching Poly(lactic acid) Prepared via Electron Beam Irradiation[J]. China Plastics, 2008, 22(08): 36-40 .

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Rheological Behavior of Long-chain Branching Poly(lactic acid) Prepared via Electron Beam Irradiation

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