Superior Performance of Fully Biobased Poly(lactide) via Stereocomplexation-Induced Phase Separation: Structure versus Property
Superior Performance of Fully Biobased Poly(lactide) via Stereocomplexation-Induced Phase Separation: Structure versus Property
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通过立体络合诱导相分离实现全生物基聚丙交酯的卓越性能:结构与性能
DOI:
10.1021/acssuschemeng.5b00208
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发表时间:
2015-06
影响因子:
8.4
通讯作者:
Chen, Mingqing
中科院分区:
文献类型:
--
作者:
Xu, Pengwu;Dong, Weifu;Lemstra, Piet J.;Chen, Mingqing
Superior properties such as high strength, toughness and transparency of fully biobased poly(lactide) (PLA) were achieved simultaneously without any external modifiers. The improvement in properties is well explained by a structural/morphological study. Stereocomplex PLA (SC-PLA) was obtained by melt compounding asymmetric poly(l-lactide)/poly(d-lactide) (PLLA/PDLA) blends at 200 °C and confirmed by wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) analyses. The SC-PLA domains (d = 950–1200 nm) lead to a physical cross-link network in the PLLA matrix. Rheology and Molau experiment reveal two different microstructures as a function of SC-PLA content, i.e., the connection of SC-PLA domains varied from chain entanglement to direct molecular bridging when the SC-PLA content increased from 10% to 23%. The SC-PLA crystals and the cross-link network reinforced the PLLA matrix, resulting in increases in melt viscosity, modulus and yield strength. Surprisingly, the elongation at break...
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影响因子:
3.2
作者:
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影响因子:
3
作者:
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通讯作者:
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T. Lebarbé;É. Grau;Benoît Gadenne;C. Alfos;H. Cramail
影响因子:
4.6
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通讯作者:
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