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Mechanical And Physical Characterization Of Bentonite And Barite Filled Low Density Polyethylene Composites

BROWSE_DETAIL_CREATION_DATE: 08-03-2018

BROWSE_DETAIL_IDENTIFIER_SECTION

BROWSE_DETAIL_TYPE: Thesis

BROWSE_DETAIL_SUB_TYPE: Masters

BROWSE_DETAIL_PUBLISH_STATE: Unpublished

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: Chemical engineering,

BROWSE_DETAIL_CREATORS: Elkawash, Hesham Mohammed S. (Author),

BROWSE_DETAIL_CONTRIBUTERS: Tirkeş, Seha (Research Responsible),

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Polyethylene, Bentonite, Barite, Surface Treatment, PolymerComposites, Extrusion.


BROWSE_DETAIL_TAB_ABSTRACT

In this thesis study, two kind of mineral fillers, bentonite (BNT) and barite (BRT),were incorporated into low density polyethylene (LDPE) by extrusion process. Silanetreatment was applied to BRT and BNT surfaces in order to increase theircompatibility with polymer matrix. Surface characteristics of fillers were examinedby fourier transformed infrared spectroscopy (FTIR) analysis. LDPE basedcomposites were prepared at one constant concentration of 10% for each fillers. Testsamples were prepared using injection molding. Mechanical, thermo-mechanical,melt-flow and morphological characterizations of unfilled LDPE and theircomposites were done by tensile and impact tests, dynamic mechanical analysis(DMA), melt flow index (MFI) test and scanning electron microscopy (SEM)technique, respectively.Test results showed that surface treatments increased the final properties ofcomposites because of better adhesion of BNT and BRT to LDPE matrix ascompared with untreated ones. Tensile and impact strengths, storage modulus andglass transition temperature of LDPE were improved by silane treated fillers. It wasconcluded from MFI test that both BRT and BNT additions resulted no remarkablechanges on melt flow rate of LDPE. According to SEM analysis of composites,silane treated BNT and BRT containing samples displayed homogeneous dispersionswhereas debondings were observed for untreated BNT and BRT filled compositesdue to their weak adhesion to polymer matrix.


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