Exploring the Application of Sustainable Poly(propylene carbonate) Copolymer in Toughening Epoxy Thermosets

被引：51
作者：
Chen, Shusheng [1 ]
Chen, Bin [1 ]
Fan, Jiashu [1 ]
Feng, Jiachun [1 ]
机构：
[1] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Collaborat Innovat Ctr Polymers & Polymer Composi, Shanghai 200433, Peoples R China
来源：
ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2015年 / 3卷 / 09期
关键词：
Poly(propylene carbonate); Block copolymer; Epoxy; Interfacial interaction; Toughening; ELASTOMER-MODIFIED EPOXIES; INDUCED MICROPHASE SEPARATION; CROSS-LINK DENSITY; MECHANICAL-PROPERTIES; BIODEGRADABLE POLYMERS; ALIPHATIC POLYCARBONATES; TRIBLOCK COPOLYMER; BLENDS; RESIN; NANOCOMPOSITES;
D O I：
10.1021/acssuschemeng.5b00343
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Herein, poly(propylene carbonate) (PPC) was used as initiator for epsilon-caprolactone polymerization to produce the poly(e-caprolactone)-block-poly(propylene carbonate)-block-poly(epsilon-caprolactone) (PCL-PPC-PCL) triblock copolymer, enabling innovative application of PPC as a toughening agent of epoxy thermosets. The interfacial interaction between PPC modifiers and epoxy was enhanced significantly because PCL blocks were miscible with epoxy matrix. The size of separated PPC modifiers decreased dramatically as the amphiphilic block copolymer formed nanophases in epoxy host. Consequently, with the incorporation of 30 wt % PCL-PPC-PCL modifier into the thermoset, the tensile elongation and the area under the stress strain curves increased by more than 320% and 180%, respectively, compared with neat epoxy, indicating that an excellent toughening effect was achieved using this strategy. Considering that PPC possessed an ocean of attractive properties but suffered from its low glass transition
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收藏
页码：2077 / 2083
页数：7
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