Raman spectra, thermal and mechanical properties of poly(ethylene terephthalate) carbon-based nanocomposite films
Raman spectra, thermal and mechanical properties of poly(ethylene terephthalate) carbon-based nanocomposite films
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DOI：
10.1007/s10965-015-0680-z
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发表时间：
2015-02-26
影响因子：
2.8
通讯作者：
Nunn, Nick
中科院分区：
文献类型：
--
作者：
Bistricic, Lahorija;Borjanovic, Vesna;Nunn, Nick
通过熔融挤出制备具有lwt %的以羧基封端的纳米金刚石（PET-NDCOOH）的聚（对苯二甲酸乙二醇酯）（PET）纳米复合膜、含有lwt %的NDCOOH和0.3wt %的纳米石墨烯片晶的PET纳米复合膜（PET-NDCOOH-NGP）和纯PET膜。进行拉曼光谱以建立纳米填料（NDCOOH和纳米石墨烯片晶（NGP））和聚合物基质之间的相互作用。采用差示扫描量热法（DSC）和热重分析（TGA）研究了PET纳米复合材料的热行为。通过在平行于和垂直于膜制备方向的方向上从制备的膜切割的条带上进行拉伸测试来测定机械性能。拉曼光谱和DSC结果表明，NDCOOH和NGP的引入到复合材料中提高了结晶度，诱导晶体在聚合物基体中的生长。热重分析结果表明，NDCOOH和NGP的加入提高了复合材料的热稳定性。从纵向拉伸强度测试获得的结果表明，NDCOOH颗粒的掺入导致基体塑化。横向刚度的增加可归因于NDCOOH和PET基质之间的相互作用。与纯PET相比，PET-NDCOOH-NGP纳米复合膜在两个方向上的拉伸强度都有所下降。
Poly(ethylene terephthalate) (PET) nanocomposite film with 1 wt% of nanodiamonds terminated with carboxylic groups (PET-NDCOOH), PET nanocomposite film containing 1 wt% of NDCOOH and 0.3 wt% nanographene platelets (PET-NDCOOH-NGP) and a neat PET film were prepared by melt extrusion. Raman spectroscopy was performed in order to establish the interactions between the nanofiller (NDCOOH and nanographene platelets (NGPs)) and polymer matrix. The thermal behaviour of the PET nanocomposites was studied using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Mechanical properties were determined by tensile tests performed on strips cut from the prepared films in directions parallel and perpendicular to the direction of film preparation. Raman spectroscopy and DSC results showed that incorporation of NDCOOH and NGPs into the composite enhances crystallinity, inducing the growth of crystals in the polymer matrix. According to TGA results, the addition of NDCOOH and NGP enhanced thermal stability. The results obtained from the tensile strength tests in the longitudinal direction showed that incorporation of NDCOOH particles resulted in matrix plasticization. The increase in stiffness in the transversal direction can be ascribed to interactions between NDCOOH and the PET matrix. The tensile strenght of PET-NDCOOH-NGP nanocomposite film in both directions decreased in comparison to neat PET.