Properties and usage of polymer materials and their recycling in Croatia

Tema završnog rada je Svojstva i primjena polimernih materijala i njihova oporaba u Hrvatskoj. Kod polimera posebno su zanimljiva mehanička svojstva koja se dijele na kratkotrajna i dugotrajna svojstva i ona će biti opisana u nastavku ovog rada. Postoji nekoliko čimbenika koji utječu na mehanička svojstva, a to su temperatura, vlaga, brzina deformiranja i trajanje opterećenja. Razvoj i primjena polimernih materijala ima vrlo širok aspekt gledanja, jer se polimeri primjenjuju u svakodnevnom životu. Primjeri prirodnih polimera su polisaharidi, DNA, RNA, celuloza, škrob, dok u sintetske polimere spadaju vlakna, plastika, gume, premazi, boje i ljepila. U eksperimentalnom dijelu ovog rada provodi se statički vlačni pokus na standardnim ispitnim uzorcima, odnosno epruvetama, koje su normiranog oblika i dimenzija, napravljene iz lauramida, polipropilena (PP) i poli(oksi-metilena) (POM). Nakon ispitivanja provedena je usporedba materijala obzirom na zahtijevana svojstva. Posebno se obrađuje oporaba polimernih materijala u Hrvatskoj.The theme of this work is Properties and usage of polymer materials and their recycling in Croatia. Particularly interesting with polymers are their mechanical properties, which are divided into short and long term performance and they will be described later in this paper. There are several things that influence their mechanical properties, and these are temperature, moist, speed of deformation and duration of resistance. Development and usage of polymer materials has very wide aspect of usage, because polymers are used in every day life. Example of natural polymers are polysaccharides, DNA, RNA, cellulose, starch, fibers, rubber, plastics, coats, colors and glues. In the experimental part of this work we conduct a static tensile test on standard examples, that is on tubes, which have standard shape and dimension, and are made from lauramid, polypropylene and polyoxymethylene. After the experiment has been made, we have made a comparison of materials with respect to their complicated properties. We need to put emphasis on recycling of polymer materials in Croatia