期刊
COMPOSITES PART B-ENGINEERING
卷 160, 期 -, 页码 147-157出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2018.10.014
关键词
Polymer-matrix composites (PMCs); Fracture toughness; Mechanical testing; Cure
资金
- National Natural Science Foundation of China [21664003, 21875047]
- Natural Science Foundation of Guangxi Province [2016GXNSFAA380145]
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology Foundation [2017K002]
It is a challenge to simultaneously improve the stiffness and toughness of polymer blends due to that the stiffness and toughness are two mutually exclusive attributes. In this paper, we successfully prepared dynamically vulcanized polypropylene/ethylene-propylene-diene rubber (PP/EPDM) blends with balanced stiffness and toughness through in-situ compatibilization of in-situ formed zinc dimethacrylate (i-ZDMA). The i-ZDMA came from the neutralization of methacrylic acid (MAA) and excess zinc oxide (ZnO) nanoparticles. With i-ZDMA, strong PP/EPDM interface and size reduction of EPDM particles were achieved during peroxide-induced dynamic vulcanization. The average size of EPDM particles was reduced to 260-280 nm, which significantly enlarged PP/EPDM interfacial surfaces. At the same time, the residual excess ZnO nanoparticles migrated into PP phase and served as nucleating agents to increase the crystallinity of PP phase. When the MAA/ZnO reached 2/1.3, the Izod impact strength was increased to 80.1 kJ/m(2), nearly 1.6 times that of the blend without i-ZDMA and 22 times that of neat PP, while the Young's modulus and yield stress were increased to 373 MPa and 14.8 MPa, respectively, showing an improved rigidness of blend.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据