MICELLAR MORPHOLOGY OF CRYSTALLINE BLOCK COPOLYMERS
Compared with the numerous literatures about micelles of coil-coil block copolymers, the micelles of crystalline-coil block copolymers, in which the core of the micelles is crystalline, are rarely reported. The crystalline-coil micelles of block copoiymers can be viewed as the solvent-soluble corona grafted on the both sides of the lamellar crystals. The grafting density is determined by the chain folding number of the crystalline block, which is related to the lengths of both blocks and crystallization temperature. A longer crystalline block usually leads to a larger chain folding number and a lower grafting density. On the other hand, when the solvent-soluble block is long, deformation of this block may cause free energy penalty, leading to a larger chain folding number for the crystalline block to reduce the grafting density. The long solvent-soluble block may also prevent the growth of the central lamellar crystals into large aggregates, thus spherical and cylindrical micelles may be observed. Moreover, the free energies of the folding surface and the lateral surface also affect the chain folding number of the crystalline block and thus micellar morphology.
Jun-Ting Xu Zi-Xiu Du De-Zhong Pan Zhi-Qiang Fan
Department of Polymer Science & Engineering,Zhejiang University,Hangzhou 310027,China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
243-244
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）