Melt chain dimensions of polylactide

被引：50

作者：

Anderson, KS ^{[1
]}

Hillmyer, MA ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

来源：

MACROMOLECULES | 2004年 / 37卷 / 05期

关键词：

D O I：

10.1021/ma0357523

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Melt chain dimensions of two polylactide samples were measured using small-angle neutron scattering. Three polylactides were synthesized: a deuterated polylactide containing 26% R-stereocenters (d-PLA-26), a hydrogenous polylactide with an R-content similar to the deuterated polylactide (PLA-28), and a hydrogenous polylactide that contained no R-stereocenters (PLA-0). The hydrogenous polylactides were each solution blended with the d-PLA-26 at a volume fraction of 0.2 for the deuterated polymer, and the melt chain dimensions of these polymers were determined. Small-angle neutron scattering experiments were performed at 30degreesC for the d-PLA-26/PLA-28 blend and at 200degreesC for both the d-PLA-26/PLA-28 and d-PLA-26/PLA-0 blends. Using three analysis methods, the average values for the statistical segment lengths, based on a C-6 repeat unit, were found to be 10.0 +/- 0.2 Angstrom for the PLA-28 at 30degreesC, 8.9 0.2 Angstrom for the PLA-28 at 200degreesC, and 9.9 +/- 0.4 Angstrom for the PLA-0 at 200degreesC.

引用

页码：1857 / 1862

页数：6

共 37 条

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