5 高分子溶液—浙江大学.ppt

SI嵌段共聚物　 Hashimoto T, Shibayama M, Kawai H, Macromolecules 1980,13, 1237 层状(lamellar)形态 分子量增大 SAXS 球形形态 SI total Mn 657k PI block Mn 144k T Hashimoto, M Fujimura, H Kawai. Macromolecules 1980,13, 1660-1669 domain radius interdomain distance Gyroid形态的结构参数 PS-PI diblock polymers Domain周期 臂半径 H. Hasegawa, H. Tanaka, K. Yamasaki, T. Hashimoto. Macromolecules 1987,20, 1651-1662 polystyrene-b-poly-(L-lactide), neat (PLLA=0.35) PS-b-PLLA含手性嵌段，PLLA纳米左手螺旋形成六角柱堆积 Ho R-M, Chiang Y-W, Tsai C-C, Lin C-C, Ko B-T, Huang B-H (2004) J Am Chem Soc 126:2704 手性嵌段共聚物 分子取向 PS-b-PI-b-PS-b-PI-b-PS-b-PI-b-PS heptablock copolymer bridged chains loop along interfaces 将产品浸入C14（PI溶剂、PS非溶剂） 垂直取向：不受溶剂影响 平行取向：发生弯曲、分层 Wu L, Lodge TP, Bates FS (2004) Macromolecules 37:8184 结晶-非晶嵌段高分子 PI-b-PEO 平均场Spinodal线 PI-b-PEO相行为受高相互作用参数、PEO结晶的影响 含5个有序结构 CL crystalline lamellar L amorphous lamellar C hexagonal array hcp of cylinders S bcc array of spheres G gyroid phase 中等、强分离区 Simon PFW, Ulrich R, Spiess HW, Wiesner U (2001) Chem Mater 13:3464 G 液晶嵌段共聚物 in-plane spatial period = 32±4 nm, corresponding to ABBA lamellar period 星形共聚物 A2B1 A2B2 (AB)4 对称二嵌段共聚物: ODT临近条件为 (xN)c=10.5 AnBn星形共聚物 ODT临近条件为 (xN)c=10.5 AnBn星形共聚物 (AB)n星形共聚物 (AB)n星形共聚物 增大n，形成核A -壳B结构 核-壳界面存在巨大浓度涨落，相分离比类似的嵌段共聚物早 cs:动态接触浓度；c*：接触浓度；ce:缠结浓度 * * T/Tc=?c/?=(2/N)/{ln[(1-?A)/?A]/[N*(1-2?A]}=2(1-2?A)/ln[(1-?A)/?A] * The increase with time of the scaled structure factor means that the evolution of the interface structure has an inherent characteristic scale with a time dependence different from that of 1/Qm . * * * The darker 3-fold nodes represent regions of the section where the projection is along a full polystyrene rod axis. The 6-fold nodes correspond to regions in the section where triplets of polystyrene rods emanating from neighboring tetrahedra overlap in projection. * * 14万/4.6万 0.3/0.7 PS/PVME光散射 散射峰随时间逐渐移向小散射矢量，且强度增大 随时间延长，浓度涨落幅度与波长(尺度) 增大 Hashimoto T, Kumaki J