LIST OF CONTENT ABSTRACT 1. INTRODUCTION 1.1Plastic 1.2Classification of plastic1.3Application of plastic1.4Wastage management 1.5Recycle 1.6Objective 1.7degradation of polymer1.8Mechanism of degradation2. EXPRIMENT 2.1MATERIAL2.1.1PET2.1.2PS 2.1.3Sample preparation 2.2 Environment test procedure 2.2.1Colour test 2.2.2 Cold test 2.2.3 Sun light test 2.2.4 Soil test 2.2.5 Fresh water test 2.2.6 Salt water test3. TEST 3.1 Tensile strength and elongation 3.2 Hardness test 3.3 Weight loss 3.4 Moisture content

4. RESULT AND DISCUSSION 4.1 Physical parameter 4.1.1 Colour change 4.1.2 Water absorption 5. CONCLUSION 6. REFRANCE

2. EXPRIMENT 2.1.1 PET Polyethylene terephthalate commonly abbreviated PET, PETE, or the obsolete PETP or PET-P, is the most common thermoplastic polymer resin of the polyester family and is used in fibres for clothing, containers for liquids and foods, thermoforming for manufacturing, and in combination with glass fibres for engineering resins. The majority of the world's PET production is for synthetic fibre with bottle production accounting for about 30% of global demand. In the context of textile applications, PET is referred to by its common name, polyester, whereas the acronym PET is generally used in relation to packaging. Polyester makes up about 18% of world polymer production and is the third-most-produced polymer; polyethylene (PE) and polypropylene (PP) are first and second, respectively. Depending on its processing and thermal history, polyethylene terephthalate may exist both as an amorphous (transparent) and as a semi-crystalline polymer. Polymerization is through a polycondensation reaction of the monomers with water as the by product. The melting point of PET in range Tm= 250-260 o C and the glass transition temperature range is Tg= 67-81 o C

2.1.2POLYSTYRENE Polystyrene is a synthetic aromatic polymer made from the monomer styrene. Polystyrene can be solid or foamed. General purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight. It is a rather poor barrier to oxygen and water vapour and has a relatively low melting point. The melting point value of polystyrene is Tm = 240C and glass transition temperature is Tg = 100C. Polystyrene is one of the most widely used plastics, the scale of its production being several billion kilograms per year. Polystyrene can be naturally transparent, but can be coloured with colorants. Uses include protective packaging, containers, lids, bottles, trays, tumblers, and disposable cutlery. As a thermoplastic polymer, polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100C, its glass transition temperature. It becomes rigid again when cooled. This temperature behaviour is exploited for extrusion, and also for moulding and vacuum forming, since it can be cast into moulds with fine detail. Polystyrene is very slow to biodegrade and is therefore a focus of controversy. It is often abundant as a form of litter in the outdoor environment, particularly along shores and waterways, especially in its foam form.

2.1.3 SAMPLE PREPARATION

The sample prepared from PET bottle and polystyrene cup. The PET bottle and polystyrene cup show in above figure. The majority of the world's PET production is for synthetic fibre with bottle production. PET PS

The PET bottle is cut in 5cm height and 1cm width. The polystyrene cub also cut similar specification.

2.2 ENVIRONMENT TEST PROCEDURE 2.2.1 COLOUR TEST PET PS Before the PET and polystyrene samples colour are noted by visual effect. The PET and polystyrene sample colour not changed before the environment condition. These are show in above figure PET PSThe PET and polystyrene plastic sample are kept in soil and sunlight over the 672 hrs. After 672 hrs the plastic sample colour is noted. 2.2.2 COLD TEST PET PS The PET and polystyrene plastic sample are kept in cold condition for 672 hrs.The temperature of cold test is -30 o C. Then the sample are taken and treated by various test. 2.2.3 SUNLIGHT TEST PET PSIn this test the polymer sample will kept under sunlight for 672hrs to study about it is degradation. The sample are kept sunlight temperature range is minimum 30 o C to 40 o C maximum. After 672 hrs Haze formed in the sample due to sun light uv radiation. 2.2.4 SOIL TEST PET PS The PET and polystyrene samples will be immerged in municipal waste soil for 672hrs. In this test the sample will get some biodegradation in its structure and properties. Samples were cut in strip shape and buried into soil for 672 hrs. FTIR test was performed on each sample before and after the soil was buried to confirm the degradability in soil environment. The municipal type of soil is used for soil test. 2.2.5 FRESH WATER TEST PET PSWe can identify the polymers degradation by using this test method .In this test PET and PS samples are kept in fresh water. The samples are not affected by fresh water.2.2.6 SALT WATER TEST PET PS The salt water mixing range is 2 kg of salt mixed with 2.5litter of water .The sample having lot of change because the alkaline content present in the salt water. After 672 hrs the sample are treated by various tests.