Loading...
Please wait, while we are loading the content...
Self-assembly and photo-responsive behavior of novel ABC2-type block copolymers containing azobenzene moieties
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Yingying Lin, Shaoliang Zang, Minghui Xing, Yaohui He, Xiaohua Lin, Jiaping Chen, Tao |
| Copyright Year | 2012 |
| Abstract | The self-assembly behavior and photo-responsive properties of novel azobenzene based copolymers poly(ethylene oxide) monomethyl ether-block-polystyrene-block-{poly[6-(4-methoxy-azobenzene-4′-oxy) hexylmethacrylate]}2 [MPEO-b-PS-b-(PMMAZO)2] with various block lengths of PMMAZO segments in aqueous media were studied by means of transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis spectrophotometry. It was found that the critical water content for the aggregate formation increases with the PMMAZO weight fraction. By tailoring the molecular structure and copolymer concentration, various self-assembled aggregates were obtained. At a lower concentration, all the copolymers self-assembled into simple vesicles. With increasing the polymer concentration, large compound vesicles were formed. The photo-sensitive properties of the formed aggregates were also studied. Upon irradiation with a polarized light, the aggregates were elongated. Large compound vesicles were found to deform into compact spindles with a very large axial ratio. |
| Starting Page | 3131 |
| Ending Page | 3138 |
| Page Count | 8 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C2SM07100B |
| Volume Number | 8 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/sm/c2/c2sm07100b/c2sm07100b.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C2SM07100B |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
