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Miscibility Behavior Of Polymer Composites Using Fourier Transform Infrared Microscopic Imaging

Posted on:2009-07-29Degree:MasterType:Thesis
Country:ChinaCandidate:X ZhouFull Text:PDF
GTID:2121360245474548Subject:Analytical Chemistry
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The miscibility of the polymer composites has a great influence on their performance.When necessary,use of compatibilizer in the blend can significantly improve the miscibility of the polymers.Generally,the miscibility behavior was characterized by some methods,such as DSC,SEM, TEM,and traditional FTIR,etc.In this dissertation Fourier transform infrared microscopic imaging was used to investigate the miscibility of polymer composites.The following works are included.FTIR microscopic imaging was used to investigate the miscibility behavior of ethylene/vinyl acetate copolymer(EVA)and C5 petroleum resin. Images with an area of 500×500μm2 were collected in the reflection mode. The miscibility was characterized by probing the spatial distribution of the carbonyl group(C=O)of EVA in the whole images.It was found that a 1:1 hot-melt mixture of EVA and C5 resin showed a good miscibility behavior. For two different EVA copolymers,one with 18%vinyl acetate(VAc)content showed a better miscibility behavior than that with 28%VAc content.The influence of the compatibilizer,maleic anhydride grafted polypropylene(PP-g-MAH),on the miscibility of polypropylene/polyamide-6 blends(PP/PA6)was studied using attenuated total reflectance-Fourier transform infrared(ATR-FTIR)spectroscopic imaging.In measurement,the image area was 100×100μm2.Different amounts of PP-g-MAH were introduced into the polymer blends,and the miscibility was characterized by the spatial distribution of PA6 in the image based on the corrected absorbance at 1640 cm-1.It was found that small quantities of the compatibilizer could significantly improve the miscibility of the two immiscible polymers. Furthermore,our results proved that blend with six parts of PP-g-MAH by weight exhibited an optimal miscibility behavior.This work demonstrates that FTIR microscopic imaging is a direct method to visualize the miscibility of polymer composites.The methodology of FTIR imaging was improved and the fields of applications were expanded in this dissertation.This developed technique promises to become a powerful tool for studying the miscibility behavior of other more composite materials.
Keywords/Search Tags:Fourier transform infrared microscopic imaging, miscibility, polymer composites, ethylene/vinyl acetate, C5 petroleum resin, maleic anhydride grafted polypropylene, polypropylene, polyamide-6
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