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首页> 外文期刊>RSC Advances >Panoptically exfoliated morphology of chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/layered silicate nanocomposites by novel in situ covalent modification using poly (epsilon-caprolactone)
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Panoptically exfoliated morphology of chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/layered silicate nanocomposites by novel in situ covalent modification using poly (epsilon-caprolactone)

机译：氯化聚乙烯（CPE）/甲基丙烯酸乙烯酯共聚物（EMA）/层状硅酸盐纳米复合材料的全剥落形态通过使用聚（ε-己内酯）的新型原位共价修饰

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Nanocomposites of a chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/layered silicate were prepared by a direct melt blending technique and masterbatch process using two varieties of layered nanosilicates namely; polar Cloisite 30B with two hydroxyl groups in its organic modifier and non-polar Cloisite 20A. The first step was the synthesis of poly(epsilon-caprolactone) (PCL) grafted layered silicate masterbatch by covalent modification of in situ ring opening polymerization (ROP) of epsilon-caprolactone and subsequent characterization, followed by melt mixing of this layered silicate masterbatch into a CPE/EMA blend with a 60/40 ratio. A morphology study using wide angle X-ray diffraction (WXRD) and transmission electron microscopy (TEM) indicates complete exfoliation in the masterbatch PCL-g-30B and its nanocomposite (C60E40/PCL-g-30B). The addition of PCL-g-layered nanosilicate masterbatches with a higher degree of exfoliation, promoted the polymer-filler interaction as evident from Fourier transform infrared (FTIR) analysis which improved the static and dynamic mechanical properties and glass transition temperatures (T-g) of the nanocomposites. Fractography from scanning electron microscopy (SEM) images and topographical analysis using atomic force microscopy (AFM) clearly depicted improved filler dispersion in the PCL masterbatch based nanocomposites which also showed improved thermal stability to the CPE/EMA blend.
机译：氯化聚乙烯（CPE）/甲基丙烯酸乙烯酯共聚物（EMA）/层状硅酸盐的纳米复合材料是通过直接熔融共混技术和母料工艺使用两种不同的层状纳米硅酸盐制备的：在有机改性剂中带有两个羟基的极性Cloisite 30B和非极性Cloisite 20A。第一步是通过对ε-己内酯的原位开环聚合（ROP）进行共价修饰并随后表征，以合成聚（ε-己内酯）（PCL）接枝的层状硅酸盐母料，然后将该层状硅酸盐母料熔融混合至CPE / EMA比例为60/40的混合物。使用广角X射线衍射（WXRD）和透射电子显微镜（TEM）进行的形态研究表明，母料PCL-g-30B及其纳米复合材料（C60E40 / PCL-g-30B）完全脱落。从傅里叶变换红外光谱（FTIR）分析可以明显看出，添加PCL-g层状纳米硅酸盐母粒具有更高的剥离度，促进了聚合物与填料的相互作用，从而改善了聚合物的静态和动态力学性能以及玻璃化转变温度（Tg）。纳米复合材料。来自扫描电子显微镜（SEM）图像的分形术和使用原子力显微镜（AFM）的形貌分析清楚地描述了填料在PCL母料基纳米复合材料中的分散性得到改善，这也显示出对CPE / EMA共混物的热稳定性得到改善。

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