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2. 发明申请

US20060211816A1 NANOSCALE HELICAL MICROSTRUCTURES AND CHANNELS FROM CHIRAL POLY(L-LACTIDE) BLOCK CONTAINING BLOCK COPOLYMERS 失效
标题翻译：包含嵌段共聚物的聚合物（L-LACTIDE）嵌段的纳米尺寸螺旋微结构和通道
公开(公告)号：US20060211816A1
公开(公告)日：2006-09-21
申请号：US10799845
申请日：2004-03-12
申请人： Rong-Ming Ho , Yeo-Wan Chiang , Chu-Chieh Lin , Bao-Tsan Ko , Yi-Chun Chen , Tsai-Ming Chung , Hsi-Hsin Shih , Jassy Wang
发明人： Rong-Ming Ho , Yeo-Wan Chiang , Chu-Chieh Lin , Bao-Tsan Ko , Yi-Chun Chen , Tsai-Ming Chung , Hsi-Hsin Shih , Jassy Wang
IPC分类号： C08F8/00
CPC分类号： C08L53/00 , C08F293/005 , G03F7/0002
摘要： A method for making a series of nanoscale microstructures, including helical microstructures and cylindrical microstructures. This method includes the steps of: (1) forming a chiral block copolymer containing a plurality of chiral first polymer blocks and a second polymer blocks wherein the chiral first polymer blocks have a volume fraction ranging from 20 to 49%; (2) causing a phase separation in the chiral block copolymer. In a preferred embodiment, the chiral block copolymer is poly(styrene)-poly(L-lactide) (PS-PLLA) chiral block copolymer, and the copolymerization process is a living copolymerization process which includes the following steps: (a) mixing styrene with BPO and 4-OH-TEMPO to form 4-hydroxy-TEMPO-terminated polystyrene; and (2) mixing the 4-hydroxy-TEMPO-terminated polystyrene with [(η3-EDBP)Li2]2[(η3-nBu)Li(0.5Et2O)]2 and L-lactide in an organic solvent preferably CH2Cl2 to form the poly(styrene)-poly(L-lactide) chiral block copolymer. Transmission electron microscopy (TEM) and small X-ray scattering (SAXS) studies show that when the volume fraction of poly(L-lactide) is about 35-37%, nanoscale helices with a pitch of 43.8 nanometers and a diameter of 34.4 nanometers were observed.
摘要翻译：制备一系列纳米级微观结构的方法，包括螺旋微结构和圆柱微结构。该方法包括以下步骤：（1）形成含有多个手性第一聚合物嵌段的手性嵌段共聚物和第二聚合物嵌段，其中手性第一聚合物嵌段具有20至49％的体积分数; （2）引起手性嵌段共聚物中的相分离。在优选的实施方案中，手性嵌段共聚物是聚（苯乙烯） - 聚（L-丙交酯）（PS-PLLA）手性嵌段共聚物，共聚方法是一种活性共聚方法，其包括以下步骤：（a）用BPO和4-OH-TEMPO形成4-羟基-TEMPO封端的聚苯乙烯; 和（2）将4-羟基-TEMPO封端的聚苯乙烯与[（η3 -EBP）Li 2 N 2 [（η 在有机溶剂中，Li（0.5Et 2 O）] 2 N和L - 丙交酯优选CH 2 2 Cl 2以形成聚（苯乙烯） - 聚（L-丙交酯）手性嵌段共聚物。透射电子显微镜（TEM）和小X射线散射（SAXS）研究表明，当聚（L-丙交酯）的体积分数为约35-37％时，具有43.8纳米的间距和34.4纳米的直径的纳米级螺旋被观察到。

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