Pildvielas un robežslāņa ietekmes analīze uz epoksīda/māla nanokompozīta īpašībām
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Latvijas Universitāte
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Abstract
Šī darba mērķis ir novērtēt pildvielas un starpfāžu slāņa ietekmi uz epoksīda/māla nanokompozīta (NK) mehānisko uzvedību. Tika realizēti mitruma sorbcijas eksperimenti atmosfērās ar relatīvo mitrumu no 24 līdz 98%. Tika veikti kvazistatiskie stiepes eksperimenti, termogravimētrijas analīze un diferenciāli skenējošās kalorimetrijas eksperimenti uz paraugiem ar dažādu māla saturu sausā un mitrinātā stāvoklī. Izmantojot atomspēku mikroskopu, tika izpētīta nanokompozīta virsmas topogrāfija. Elastības un sorbcijas īpašības tika aprēķinātas pēc NK struktūras komponenšu īpašībām. Starpfāžu slānis tika ievests saskaņā ar hibrīda starpfāžu modeli. Tika novērtēta starpfāžu slāņa satura ietekme uz NK elastības un sorbcijas īpašībām un tika dabūta laba atbilstība eksperimentu rezultātiem.
The aim of this work is to estimate the effect of filler and boundary layer on mechanical performance of epoxy/clay NC. Moisture sorption was performed in atmospheres with relative humidity from 24 till 98%. Quasi static tensile tests, thermogravimetric analysis and differentially scanning calorimetry tests were performed on the specimens with different clay content in dry and wet state. Atomic force microscope was used to investigate surface topography of NC. Elastic and sorption properties were calculated using properties of structural components of NC. The interphase layer is introduced according to the hybrid interphase model. The estimation of the effect of interphase layer content is derived and good correspondence to experimental results was achieved.
The aim of this work is to estimate the effect of filler and boundary layer on mechanical performance of epoxy/clay NC. Moisture sorption was performed in atmospheres with relative humidity from 24 till 98%. Quasi static tensile tests, thermogravimetric analysis and differentially scanning calorimetry tests were performed on the specimens with different clay content in dry and wet state. Atomic force microscope was used to investigate surface topography of NC. Elastic and sorption properties were calculated using properties of structural components of NC. The interphase layer is introduced according to the hybrid interphase model. The estimation of the effect of interphase layer content is derived and good correspondence to experimental results was achieved.