145. Combination of Magnetic and Enhanced Mechanical Properties for Copolymer-Grafted Magnetite Composite Thermoplastic Elastomers
writer：Feng Jiang, Yaqiong Zhang, Zhongkai Wang, Wentao Wang, Zhaohua Xu, and Zhigang Wang*
keywords：磁性復(fù)合彈性體，接枝聚合，力學(xué)性能
source：期刊
specific source：ACS Appl. Mater. Interfaces,2015, 7, 10563-10575
Issue time：2015年
Composite thermoplastic elastomers (CTPEs) of magnetic copolymer-grafted nanoparticles (magnetite, Fe3O4) were synthesized and characterized to generate magnetic CTPEs, which combined the magnetic property of Fe3O4 nanoparticles and the thermoplastic elasticity of the grafted amorphous polymer matrix. Fe3O4 nanoparticles served as stiff, multiple physical cross-linking points homogeneously dispersed in the grafted poly(n-butyl acrylate-co-methyl
methacrylate) rubbery matrix synthesized via the activators regenerated
by electron transfer for atom transfer radical polymerization method
(ARGET ATRP). The preparation technique for magnetic CTPEs opened a new
route toward developing a wide spectrum of magnetic elastomeric
materials with strongly enhanced macroscopic properties. Differential
scanning calorimetry (DSC) was used to measure the glass transition
temperatures, and thermogravimetric analysis (TGA) was used to examine
thermal stabilities of these CTPEs. The magnetic property could be
conveniently tuned by adjusting the content of Fe3O4 nanoparticles in CTPEs. Compared to their linear copolymers, these
magnetic CTPEs showed significant increases in tensile strength and
elastic recovery. In situ small-angle X-ray scattering measurement was
conducted to reveal the microstructural evolution of CTPEs during
tensile deformation.