Single-Molecule Force Spectroscopy Study on Force-Induced Melting in Polymer Single Crystals: The Chain Conformation Matters

被引：38
作者：
Song, Yu [1 ,2 ]
Ma, Ziwen [1 ]
Yang, Peng [1 ]
Zhang, Xiaoye [1 ]
Lyu, Xiujuan [1 ]
Jiang, Ke [1 ]
Zhang, Wenke [1 ]
机构：
[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China
[2] Jilin Univ, Inst Theoret Chem, Changchun 130012, Jilin, Peoples R China
来源：
MACROMOLECULES | 2019年 / 52卷 / 03期
基金：
中国国家自然科学基金;
关键词：
FERRIC-THIOLATE BONDS; POLYETHYLENE; DEFORMATION; DYNAMICS; ANGLE; POLYSACCHARIDES; TRANSITION; MECHANISMS; STRENGTH; PROTEIN;
D O I：
10.1021/acs.macromol.8b02702
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Understanding the conformation effect on force-induced melting is important for developing advanced semi-crystalline polymer materials. Here, two types of polymer single crystals, polycaprolactone (zigzag conformation) and poly(L-lactic acid) (helical conformation), have been selected to study the conformation effect on force-induced melting by using the atomic force microscopy (AFM)-based single-molecule force spectroscopy (SMFS). We find that the zigzag chains facilitate the stick-slip motion, and the single helical chain takes smooth motion during force-induced melting from the single crystals. Furthermore, we illustrate that the conformation acts on the force-induced melting by defining the interaction in between the adjacent stems. This SMFS study deepens our understanding on the relationship between the chain conformation and nanomechanical properties of polymer crystals.
引用
收藏
页码：1327 / 1333
页数：7
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