Razgradnja PP/PCL mješavina bez i s dodatkom nTiO2

undergraduate thesis

• Title (english): Degradation of PP/PCL blends without and with nTiO2
• Author: Vesna Bijelić
• Mentor: Emi Govorčin Bajsić (mentor)
• Committee member: Emi Govorčin Bajsić (predsjednik povjerenstva)
• Committee member: Nina Vranješ Penava (član povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2015-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Za razliku od prirodnih polimera, većina sintetskih polimera ne može se razgraditi mikroorganizmima, te ovi polimeri predstavljaju veliki problem za okoliš stoga se istražuje drugi način njihovog zbrinjavanja. Danas postaje vrlo važno istraživanje biorazgradivih svojstava sintetskih polimera. Dolazi do razvoja novih tehnika u cilju dobivanja ekološki prihvatljivih polimera. Za rješavanje problema zbrinjavanja polimernih materijala i dobivanje ekološki prihvatljivih polimernih materijala primjenjuje se modifikacija nebiorazgradivih sintetskih polimera s biorazgradivim polimerima. Glavni problem u modifikaciji nerazgradivih sintetskih polimera s biorazgradivim polimerima predstavlja kompatibilnost polimernih mješavina s različitim svojstvima. Polipropilen (PP) je termoplastični polimer koji se u okolišu teško razgrađuje mikroorganizmima. Unatoč brojnim komercijalnim primjenama, nedostatak polipropilena su slabe interakcije i kombatibilnost s drugim polimernim materijalima. Cilj ovog rada je poboljšanje svojstva PP, kao i njegove biorazgradivosti miješanjem s biorazgradivim poliester polikaprolaktonom (PCL). PCL je netoksični, biološki razgradiv polimerni materijal koji se miješa s različitim sintetskim polimerima u različitim omjerima. Glavni problem je u pripremi PP/PCL polimernih mješavina je njihova kompatibilnost . U ovom radu prikazani su rezultati toplinskih svojstva i kompatibilnosti PP/ PCL mješavina ojačanih česticama nano titan dioksida (nTiO2) te utjecaj nTiO2 na toplinska svojstva kao i na kompatibilnost. Titanijev dioksid često se koristi kao anorgansko punilo zbog svoje dobre mehaničke čvrstoće. Čisti uzorci, mješavine PP/PCL s dodatkom i bez dodatka nTiO2 pripremljeni su u dvopužnom ekstruderu Rondol 21 mm LAB TWIN , granule polimernih mješavina prešane su na hidrauličkoj preši Dake Model 44-226. Za istraživanje toplinskih svojstava čistih polimera, te polimernih mješavine s dodatkom i bez dodatka nTiO2 korištene su tehnike diferencijalne pretraže kalorimetrije (DSC) i dinamičko mehanike analize (DMA).

Abstract (english)

Unlike natural polymers, most synthetic polymers can not be decomposed by microorganisms, hence the landfill approach becomes inefficient, and other plastics waste management should be found. A study of the biodegradation properties of synthetic polymers has become very important. New techniques have been developed to obtain environmentally friendly polymers. A modification of non-biodegradable synthetic polymers with a biodegradable polymer producing environmentally friendly polymers is an established technique to solve this problem. The main problem in modification of non-biodegradable synthetic polymers with biodegradable polymers is compatibility between polymers mixtures with different properties. Polypropylene (PP) is a thermoplastic polymer and difficult to be decomposed by microorganisms in environment. Despite its many commercial application, polypropylene suffers a major deficiency that is poor interaction and compatibility with other materials. The aim of this work is to improve the properties of PP as well as its biodegradability by blending with biodegradable polyester polycaprolactone (PCL). PCL is nontoxic, biodegradable polymer material and can be blended with various synthetic polymers over a wide composition range. The main problem in preparation of PP/PCL polymer blends is compatibility between polymers. In this work is presented results of thermal properties and compatibility of PP and PCL polymer blends reinforced with nano sized titan dioxide (TiO2) particles as well as effect of nTiO2 reinforcement on the thermal properties and compatibility. Titan dioxide, one of the inorganic materials with high mechanical strengths, is used as reinforcement material for polymers. The neat polymers, PP/PCL and PP/PCL (nTiO2) polymer blends were prepared by melt compounding with a twin screw extruder Rondol 21 mm LAB TWIN , the granules of the blends were compression molding in hydraulic press. The thermal properties of the neat polymers, PP/PCL and PP/PCL/nTiO2 blends are measured using the differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) techniques.

• Keywords: polipropilen; polikaprolakton; nTiO2; toplinska stabilnost; polimerne mješavine; toplinska svojstva
• Keywords (english): polypropylene; polycaprolactone; nTiO2; thermal stability; polymers blends; thermal properties
• Language: croatian
• URN:NBN: urn:nbn:hr:149:215659
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-09-09 12:13:07