Physical properties of poly(tetrahydrofuran)-block-poly(2-ethyl-2-oxazoline) triblock copolymer

被引：9
|
作者：
Motokucho, Suguru [1 ]
Furukawa, Mutsuhisa [2 ]
Kawashima, Masahiro [3 ]
Kojio, Ken [1 ]
Yoshinaga, Kohji [1 ]
机构：
[1] Nagasaki Univ, Grad Sch Engn, Nagasaki 8528521, Japan
[2] Nagasaki Univ, Nagasaki 8528521, Japan
[3] Nagasaki Univ, Grad Sch Sci & Technol, Nagasaki 8528521, Japan
来源：
POLYMER JOURNAL | 2013年 / 45卷 / 11期
关键词：
block copolymer; phase separation; poly(tetrahydrofuran); ring-opening polymerization; MICROPHASE SEPARATION;
D O I：
10.1038/pj.2013.39
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
ABA-type triblock copolymers (PEOxz-PTHF-PEOxz) composed of poly(tetrahydrofuran) (PTHF) and poly(2-ethyl-2-oxazoline) (PEOxz) were synthesized by cationic sequential polymerization. Differential scanning calorimetry and wide-angle X-ray diffraction analyses revealed that PEOxz-PTHF-PEOxzs produced a microphase separation structure, which consisted of a partially crystallized amorphous PTHF phase containing PEOxz chains on both ends. Tensile testing showed that PEOxz-PTHF-PEOxz exhibited tough mechanical properties that differed from those of the brittle PTHF homopolymer. Thus, it was suggested that the amorphous PTHF/PEOxz phase played a role in physically cross-linking the moieties via entanglement, resulting in a PEOxz-PTHF-PEOxz material with tough mechanical properties and the ability to be cold-drawn.
引用
收藏
页码：1115 / 1119
页数：5
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