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81.09; 61.31

Thái Hoàng; Nguyễn Thúy Chỉnh; Nguyễn Thị Thu Trang; Vũ Quốc Mạnh; Vũ Quốc Mạnh(1)

Tổng hợp nanosilica và vật liệu nanocompozit EVA/silica có sử dụng chất tương trợ hợp EVAgMA

Preparation of nanosilica and EVA/silica nanocomposite in the presence of EVAgMA

Hóa học

2012

1

96-100

0866-7144

Nanosilica; Nanocopozit EVA/silica; Tổng hợp vật liệu; Chất tương trợ EVAgMA

Silica nanoparticles were prepared fTom tetraethoxysilane (TEOS) in ethanol solvent by sol-gel method with alkaline catalyst. The IR spectrum of silica nanoparticles shows that they were successfully prepared through strong peaks characterizing the stretching and bending vibration of Si-O group. Silica nanoparticles were formed in sphere shape with the average size particle about 50-100 nm (as shown in FESEM image). The X-Ray diffTaction (XRD) pattern exhibits silica nanoparticles are amorphous. With the above characteristics, silica nanoparticles are suitable to use as reinforcement for ethylene vinyl acetate (EVA) copolymer. The obtained results of rheological and thermal properties of EVA/silica nanocomposites proved that the dynamic storage modulus and thermal stability of EVA were remarkable enhanced by using nanosilica. Specially, addition of ethylene vinyl acetate copolymer grafted maleic anhydride (EVAgMA) as a compatibilizer into EVA/silica nanocomposites, the above properties of the nanocomposites are significantly increased.

TTKHCNQG, CVv14