Microscopic Morphology of Chlorinated Polyethylene-Based Nanocomposites Synthesized from Poly(-caprolactone)/Clay Masterbatches
详细信息 查看全文
- 作者：Patrick Brocorens ; Samira Benali ; Cé ; dric Broekaert ; Fabien Monteverde ; Hans E. Miltner ; Bruno Van Mele ; Michaë ; l Alexandre ; Philippe Dubois ; Roberto Lazzaroni
- 刊名：Langmuir
- 出版年：2008
- 出版时间：March 4, 2008
- 年：2008
- 卷：24
- 期：5
- 页码：2072 - 2080
- 全文大小：1501K
- 年卷期：v.24,no.5(March 4, 2008)
- ISSN：1520-5827
文摘
Chlorinated polyethylene (CPE) nanocomposites were synthesized by melt blending clay-rich/poly(
-caprolactone)(PCL) masterbatches to CPE matrices. The masterbatches were prepared following two synthetic routes: either PCLis melt-blended to the clay or it is grafted to the clay platelets by in situ polymerization. The microscopic morphologyof the nanocomposites was characterized by X-ray diffraction, atomic force microscopy, transmission electron microscopy,and modulated temperature differential scanning calorimetry. When using free PCL, intercalated composites areformed, with clay aggregates that can have micrometric dimensions and a morphology similar to that of the talcparticles used as fillers in commercial CPE. PCL crystallizes as long lamellae dispersed in the polymer matrix. Whenusing grafted PCL, the nanocomposite is intercalated/exfoliated, and the clay stacks are small and homogeneouslydispersed. PCL crystallizes as lamellae and smaller crystals, which are localized along the clay layers. Thanks to thegrafting of PCL to the clay platelets, these crystalline domains are thought to form a network with the clay sheets,which is responsible for the large improvement of the mechanical properties of these materials.
-caprolactone)(PCL) masterbatches to CPE matrices. The masterbatches were prepared following two synthetic routes: either PCLis melt-blended to the clay or it is grafted to the clay platelets by in situ polymerization. The microscopic morphologyof the nanocomposites was characterized by X-ray diffraction, atomic force microscopy, transmission electron microscopy,and modulated temperature differential scanning calorimetry. When using free PCL, intercalated composites areformed, with clay aggregates that can have micrometric dimensions and a morphology similar to that of the talcparticles used as fillers in commercial CPE. PCL crystallizes as long lamellae dispersed in the polymer matrix. Whenusing grafted PCL, the nanocomposite is intercalated/exfoliated, and the clay stacks are small and homogeneouslydispersed. PCL crystallizes as lamellae and smaller crystals, which are localized along the clay layers. Thanks to thegrafting of PCL to the clay platelets, these crystalline domains are thought to form a network with the clay sheets,which is responsible for the large improvement of the mechanical properties of these materials.