期刊
POLYMER
卷 117, 期 -, 页码 25-29出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2017.03.058
关键词
Polylactide; Stereocomplexation; Copolymer
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT)
When poly(d-lactide) (PDLA) is mixed with poly(l-lactide) (PLLA) of similar molecular weight and crystallized from the melt in ultrathin films (30 nm), hexagonal single crystals are obtained at the equimolar composition, and triangular single crystals at non-equimolar compositions. Here, stereo complexes are formed by blending PDLA with a PLLA incorporated as the central block of a triblock copolymer made with poly(2-dimethylaminoethyl methacrylate) (PDMAEMA-b-PLLA-b-PDMAEMA or BAB); the resulting single crystals are studied by in-situ atomic force microscopy. The imbalance between the PDLA and PLLA characteristics, due to the presence of the B blocks of the triblock copolymer, leads to triangular single crystals at equimolar compositions, the hexagonal single crystal morphology being shifted to off-equimolar compositions. The importance of the shift depends upon the A/B ratio and the molecular weight of each species. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据