S-Space College of Agriculture and Life Sciences (농업생명과학대학) Dept. of Forest Sciences (산림과학부) Theses (Master's Degree_산림과학부)
Fabrication and Characterization of Flame-Retardant Nanocomposites based on ethylene Vinyl Acetate and Cationic Clay
에틸렌 비닐 아세테이트 및 양이온성 클레이를 기반으로 한 난연 나노복합체의 제조 및 특성
- 김 현 중
- 농업생명과학대학 산림과학부(환경재료과학전공)
- Issue Date
- 서울대학교 대학원
- Polymer/layered silicate nanocomposites; Smectite clay; Organoclay; Ethylene vinyl acetate; Mechanical properties; Flame retardants
- 학위논문 (석사)-- 서울대학교 대학원 : 산림과학부(환경재료과학전공), 2014. 2. 김현중.
- Polymer/layered silicate (PLS) nanocomposites have attracted
great interest, because they have shown remarkable effects in mechanical
properties, thermal stability and flame retardants. The main objective of this
study is to investigate the effect of particle size and organic modifier of clay
in ethylene-vinyl acetate/clay composites. First, different particle sized
pristine smectite clays, S1ME and Laponite-XLG, were selected and the
pristine clays were modified with two different akyl ammonium surfactants.
Ethylene-vinyl acetate (EVA)/pristine clay or organoclay masterbatches
were prepared with solution blending to prevent the loss of clay and to
introduce the well dispersion. Nanocomposites were compounded via melt
blending with the masterbatches and maleic anhydride grafted EVA (MA-g-
EVA) as compatablizing agent.
In addition, the optimum organoclay for mechanical properties
and flame retardants was selected and determined of various concentrations.
The nanocomposites were characterized using FT-IR spectroscopy to
determine the organic modification. Modification effect on the dispersion
was investigated by using X-ray diffraction (XRD) and scanning electron
microscopy (SEM). Universal testing machine (UTM) and dynamic
mechanical analysis (DMA) were used to study tensile properties and
dynamic mechanical property of the nanocomposites. To investigate the
thermal degradation, thermogravimetric analysis (TGA) was employed. The
final nanocomposites were characterized in terms of flame retardant
properties by cone calorimeter.