材料科学
复合材料
扫描电子显微镜
玻璃化转变
相(物质)
聚碳酸酯
表面改性
聚合物
化学工程
化学
有机化学
工程类
作者
B.L.N. Krishna Sai,Pankaj Tambe
标识
DOI:10.1080/09276440.2021.1986974
摘要
In this work, the surface modification of hollow glass microsphere (H.G.M) is done through hydroxylation reaction and silanization reaction for attaching hydroxyl (OH) and amine (NH2) functional groups, respectively. The H.G.M and surface-modified H.G.M are melt-mixed using a twin-screw extruder to process 70/30 (wt/wt) polycarbonate (P.C)/acrylonitrile butadiene styrene (A.B.S) blends and its composites followed by injection moulding. Plasticization of the P.C phase is observed due to H.G.M-OH interaction with P.C phase. While there is the formation of aminolysis compound due to melt-interfacial reaction between H.G.M-NH2 and P.C phase. Scanning electron microscope (S.E.M) observation shows the formation of matrix-droplet morphology for all the compositions of H.G.M and surface-modified H.G.M-filled 70/30 (wt/wt) P.C/A.B.S blend and its composites. However, the incorporation of H.G.M and surface-modified H.G.M in 70/30 (wt/wt) P.C/A.B.S blend improved the processability as observed from rheological characterization. Surface-modified H.G.M influences the glass transition temperature (Tg) of the P.C phase of 70/30 (wt/wt) P.C/A.B.S blend. Among H.G.M-OH and H.G.M-NH2-filled 70/30 (wt/wt) P.C/A.B.S blend; the H.G.M-NH2-filled 70/30 (wt/wt) P.C/A.B.S blend shows the highest improvement in flexural and impact properties. In addition, the fracture mechanism of H.G.M and surface-modified H.G.M-filled 70/30 (wt/wt) P.C/A.B.S blend and its composites under flexural and impact loading are proposed with the help of S.E.M fracture surface images.
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