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Characterization and flammability of ethylene vinyl acetate / Nur Diyana Mohd Zaharri

Characterization and flammability of ethylene vinyl acetate / Nur Diyana Mohd Zaharri
Tesis ini menerangkan penghasilan, pengujianan dan sifat-sifat zeolite sebagai pengisi dalam komposit ethylene vinyl acetate (EVA). Salah satu objektif utama dalam kajian ini ialah untuk menentukan kesan pembebanan zeolite terhadap sifat-sifat matriks EVA komposit. Komposit EVA yang terdiri daripada berlainan pembebanan zeolite (5-25 vol. %) disediakan menggunakan pencampur dalaman Thermo Haake Polydrive dan kemudian diacu mampatan mengikut piawaian. Ujian tegangan dan dinamik mekanikal analisis telah dijalankan bagi menguji sifat mekanikal komposit EVA/zeolite. Penurunan kekuatan tegangan dan pemanjangan boleh diterangkan melalui mikrograf permukaan patah disebabkan tegangan menggunakan analisis pengimbas elektron mikroskopi. Disamping itu, kesan pengubahsuaian permukaan ke atas sifat-sifat komposit EVA/zeolite telah disiasat. Interaksi antaramuka di antara EVA dan zeolite diubahsuai melalui silang-hubung EVA dengan dicumyl peroxide (DCP); kaedah kation pertukaran dengan surfaktan organic (octadecylamine) dan juga rawatan silane menggunakan 3- aminopropyltriethoxysilane (AMPTES). Tambahan pula, analisis spektra Fourier Transform Infra Merah (FTIR) telah dijalankan untuk mengkaji interaksi di antara komposit dan kumpulan berfungsi pengubah permukaan. Aplikasi pengubahsuaian permukaan telah dibuktikan dapat meningkatkan sifat-sifat mekanikal dan morfologikal komposit EVA/zeolite. Sifat haba komposit juga diuji dengan analisis thermogravimetric (TGA) dan kebezaan pengimbasan kalorimeter (DSC). Sistem perencat api intumescent yang mengandungi ammonium polyphosphate (APP)/ pentaerythritol (PER) telah digunakan bagi meningkatkan sifat haba dan perencatan kebakaran komposit EVA/zeolite. Sifat mekanikal yang diuji melalui ujian regangan menunjukkan penambahan kedua-dua perencat api menyebabkan penurunan sifat regangan dan pemanjangan komposit EVA/zeolite. Walaubagaimanapun, modulus regangan komposit meningkat dengan ketara kerana ketegaran partikel APP. Keputusan DSC dan TGA menunjukkan kedua-dua perencat api telah meningkatkan kestabilan haba komposit. Keputusan ujian pembakaran menegak (UL-94-V) dan indeks oksigen had (LOI) menunjukkan perencat api dapat menurunkan kebolehbakaran komposit dengan mencapai tahap V-0 UL94-v dan meningkatkan nilai LOI. This thesis describes the fabrication, characterization and properties of natural zeolite as filler in ethylene vinyl acetate (EVA) composites. One of the main objectives of this research is to determine the effect of zeolite loading on properties of EVA matrix composites. EVA composites at different loading of zeolite (5-25 vol. %) were prepared using Thermo Haake Polydrive internal mixer and were then compression molded according to standard test specimen. Tensile test and dynamic mechanical analysis (DMA) were performed to characterize the mechanical properties of EVA/zeolite composites. The tensile test can also be explained from the analysis of Scanning Electron Microscopy (SEM) micrograph of the tensile fractured surfaces. Besides, the influences of surface modifications on the properties of EVA/zeolite composites were also investigated. The interfacial interactions between EVA and zeolite were modified by crosslinking of EVA with dicumyl peroxide (DCP); cation exchange method using organic surfactant (octadecylamine) and also silane treatment using 3-aminopropyltriethoxysilane (AMPTES). In addition, Fourier Transform Infra red (FTIR) spectra analyses were performed in order to study the interaction between the composites and functional group of the surface modifiers. The application of surface modifications was proved to enhance the mechanical and morphological properties of EVA/zeolite composites. Thermal properties of the composites were also characterized by means of thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Intumescent flame retardant system consisting of ammonium polyphosphate (APP)/ pentaerythritol (PER) was used to enhance the thermal properties and fire retardancy of EVA/zeolite composites. The mechanical properties examined by tensile test indicated that the introduction of both flame retardants lead to deterioration of tensile strength and elongation at break of EVA/zeolite composites. However, the tensile modulus of the composites was significantly enhanced attributed to the rigidity of APP particles. The results of DSC and TGA showed that both types of flame retardants have the ability to enhance the thermal stability of EVA/zeolite composites. Meanwhile the results of vertical burning testing (UL-94-V) and limiting oxygen index (LOI) measurement revealed that the flame retardants could also reduce the flammability of the composites by achieving V-0 UL94-v rating and increased LOI value, respectively.
Contributor(s):
Nur Diyana, Mohd Zaharri - Author
Secondary Item Type(s):
Thesis
Subject Keywords:
Zeolite ; ethylene vinyl acetate (EVA) ; Thermo Haake Polydrive ; dicumyl peroxide (DCP) ; Fourier Transform Infra red (FTIR)
Sponsor - Description:
Pusat Pengajian Kejuruteraan Elektrik & Elektronik -
First presented to the public:
1/1/2017
Original Publication Date:
12/3/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 24
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-12 12:14:58.875
Date Last Updated
2020-06-09 17:01:40.453
Submitter:
Mohd Fadli Abd. Rahman

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Characterization and flammability of ethylene vinyl acetate / Nur Diyana Mohd Zaharri1 2018-03-12 12:14:58.875