Effects of nanoparticle size and concentration on optical, toughness, and thermal properties of polycarbonate

Effects of nanoparticle size and concentration on optical, toughness, and thermal properties of polycarbonate
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纳米颗粒尺寸和浓度对聚碳酸酯光学、韧性和热性能的影响

DOI:
10.1002/app.47634
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发表时间:
2019
影响因子:
3
通讯作者:
Schlarb
Schlarb
中科院分区:
化学3区
文献类型:
--
作者:
Schlarb

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研究了二氧化硅纳米粒子的大小和含量对聚碳酸酯(PC)的形态、光学、韧性和热性能的影响。采用双螺杆挤出机注射成型法制备了PC纳米复合材料。扫描电子显微镜(SEM)照片显示,纳米二氧化硅颗粒在PC基质中有足够的分布,但仍有一些团聚的颗粒。随着纳米颗粒含量的增加,会形成稍大的团聚。这些凝聚的颗粒由于反射和散射造成光损失,导致材料透明度降低。然而,纳米二氧化硅的加入大大改善了PC的韧性,并略微提高了玻璃化转变温度(Tg),同时还增加了填料的含量(最高可达4vol%)。尤其是较小尺寸的纳米二氧化硅,它不仅显著改善了韧性,而且增强了PC纳米复合材料的光学性能。2019威利期刊公司J.应用。波兰姆。科学2019,136,47634。
The influences of size and content of silicon dioxide (SiO2) nanoparticles on the morphological, optical, toughness, and thermal properties of polycarbonate (PC) were investigated. The PC nanocomposites were prepared using a twin‐screw extruder followed by injection molding. The scanning electron microscope (SEM) micrographs displayed an adequate level of nano‐SiO2particle distribution within the PC matrix but still revealed some agglomerated particles. Upon increasing the content of nanoparticles, slightly larger agglomerates formed. These agglomerated particles caused a reduction in material transparency due to light loss via reflection and scattering. However, the incorporation of nano‐SiO2into the PC matrix greatly improved toughness properties and slightly increased glass‐transition temperature (Tg), in conjunction with filler content (up to 4 vol %). This was particularly in the case with the smaller sized nano‐SiO2, which not only significantly improved toughness but also enhanced optical properties of the PC nanocomposites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019,136, 47634.
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