Fabrication of High Toughness Poly(lactic acid) by Combining Plasticization with Cross-linking Reaction

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• 作者：Zhongjie Ren ; Huihui Li ; Xiaoli Sun ; Shouke Yan ; Yuming Yang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：May 30, 2012
• 年：2012
• 卷：51
• 期：21
• 页码：7273-7278
• 全文大小：301K
• 年卷期：v.51,no.21(May 30, 2012)
• ISSN：1520-5045

文摘

A new method to produce high toughness Poly(lactic acid) (PLA) was introduced in this study. The blends of low molecular weight triacetin (TAC) and oligomeric poly(1,3-butylene glycol adipate) (PBGA) were first used as multiple plasticizers to lubricate PLA and then the plasticized PLA cross-linked with triallyl isocyanurate (TAIC) through electron beam irradiation. In this way, a kind of stable PLA material with high elongation at break was obtained. The elongation at break of the prepared material is more than 260% with a tensile strength of 23.5 MPa when the irradiation dose is 10 Mrad. Detailed studies of Fourier transform infrared (FTIR) spectra and viscosity experiments revealed that both the self-cross-linking of the PLA molecular chains and the cross-linking between the molecular chains of PLA and PBGA could occur. This results in the remarkable improvement in the performance of the obtained materials.