Effect of Stereochemistry on Directed Self-Assembly of Poly(styrene-b-lactide) Films on Chemical Patterns

被引：29

作者：

Li, Xiao ^{[1
]}

Liu, Yadong ^{[2
]}

Wan, Lei ^{[3
]}

Li, Zhaolei ^{[4
]}

Suh, Hyoseon ^{[1
]}

Ren, Jiaxing ^{[1
]}

Ocola, Leonidas E. ^{[5
]}

Hu, Wenbing ^{[4
]}

Ji, Shengxiang ^{[2
]}

Nealey, Paul F. ^{[1
]}

机构：

[1] Univ Chicago, Inst Mol Engn, Chicago, IL 60637 USA

[2] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Polymer Ecomat, 5625 Renmin St, Changchun 130022, Peoples R China

[3] HGST, 3403 Yerba Buena Rd, San Jose, CA 95135 USA

[4] Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210093, Jiangsu, Peoples R China

[5] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA

来源：

ACS MACRO LETTERS | 2016年 / 5卷 / 03期

基金：

中国国家自然科学基金;

关键词：

STEREOBLOCK POLY(LACTIC ACID)S; STEREOCOMPLEX FORMATION; BLOCK-COPOLYMERS; THIN-FILMS; PERPENDICULAR ORIENTATION; DENSITY MULTIPLICATION; INTERACTION PARAMETER; TRIBLOCK COPOLYMERS; DOMAIN ORIENTATION; POLYSTYRENE;

D O I：

10.1021/acsmacrolett.6b00011

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We demonstrated here for the first time that the stereochemistry of polylactide (PLA) blocks affected the assembly behaviors of PS-b-PLA on chemical patterns. Two PS-b-PLA block copolymers, where the PLA block is either racemic (PDLLA) or left-handed (PLLA), were synthesized and directed to assemble on chemical patterns with a wide range of L-s/L-o. PS-b-PDLLA was stretched up to 70% on chemical patterns, while PS-b-PLLA was only stretched by 20%. The assembly behavior of PS-b-PDLLA was different from AB diblock copolymer, but similar to that of ABA triblock copolymer. The high stretchability might be attributed to the formation of stereocomplexes in PDLLA blocks. Compared to ABA triblock copolymers, stereocomplexed diblock copolymers have much faster assembly kinetics. This observation provides a new concept to achieve large process windows by the introduction of specific interactions, for example, H-bonding, supramolecular interaction, and sterecomplexation, between polymer chains.

引用

页码：396 / 401

页数：6

共 49 条

[1] PLA-PHB-PLA Triblock Copolymers: Synthesis by Sequential Addition and Investigation of Mechanical and Rheological Properties [J].