The nature of bonding matters: Benzoxazine based shape memory polymers

被引：47
作者：
Schaefer, Hannes [1 ,2 ]
Hartwig, Andreas [1 ,2 ]
Koschek, Katharina [1 ]
机构：
[1] Fraunhofer Inst Mfg Technol & Adv Mat IFAM, Wiener Str 12, D-28359 Bremen, Germany
[2] Univ Bremen, Chem Dept, Leobener Str, D-28359 Bremen, Germany
来源：
POLYMER | 2018年 / 135卷
关键词：
Shape memory polymers; Benzoxazines; Ring opening polymerization; PCL; Thermosets; Thermo-responsive polymers; RING-OPENING POLYMERIZATION; HIGH-STRENGTH; NETWORKS; POLYBENZOXAZINE; TEMPERATURE; BLENDS; 1,3-BENZOXAZINE; MONOMERS; POLY(EPSILON-CAPROLACTONE); POLYURETHANES;
D O I：
10.1016/j.polymer.2017.12.029
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A novel shape memory polymer is presented based on polybenzoxazine and poly(epsilon-caprolactone) (PCL). Polybenzoxazines with unbound and covalently incorporated PCL were prepared applying hydroxyl and tosyl terminated PCLs, respectively. Thermo-responsive and shape memory behavior with high shape fixity and recovery were demonstrated for samples containing a high ratio of covalently bonded PCL in a crosslinked benzoxazine structure. Samples with exclusively non-bonded PCL chains proved to be brittle, possessing a heterogeneous morphology and lacking shape memory properties. The type of bonding into benzoxazines network - covalent versus non-covalent bonding of PCL - strongly affects materials structure property relationship. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：285 / 294
页数：10
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