Plastic can be defined as: any group of synthetic or natural organic materials that may be shaped when soft‚ which will later harden. Plastic has been around for more than 150 years. In 1839 Charles Goodyear accidently discovered the process of vulcanization‚ the process of making rubber more durable‚ which evolved into the creation of plastics later on. In 1846‚ Swiss chemist Charles Schonbein discovered how to produce the plastic polymer known as celluloid. In 1909‚ chemist Leo Baekeland created
Premium Plastic New York City Bags
Materials in Our Daily Life : 95 : 21 Materials in Our Daily Life The basic aim of science is not only to study and understand natural phenomena but also to use this knowledge to make our lives more comfortable. Science and technology have enabled us to develop more economical and convenient methods to recover useful materials from nature and to put them to various uses. Chemistry has enabled us to synthesize new materials which have desired properties‚ thus‚ making them even better than natural
Premium Sodium carbonate Glass Sodium hydroxide
Plastic and Environment A plastic material is any of a wide range of synthetic or semi-synthetic organic solids that are moldable. Plastics are typically organic polymers of high molecular mass‚ but they often contain other substances. They are usually synthetic‚ most commonly derived from petrochemicals‚ but many are partially natural. Composition Most plastics contain organic polymers. The vast majority of these polymers are based on chains of carbon atoms alone or with oxygen‚ sulfur‚ or nitrogen
Premium Plastic
II PUC – CHEMISTRY (34) MODEL QUESTION PAPER - 1 Time: 3hours 15 minutes Maximum marks: 70 Instructions: 1. The question paper has four parts: A‚ B‚ C and D. All parts are compulsory. 2. Write balanced chemical equations and draw labeled diagrams wherever required. 3. Use log tables and the simple calculator if necessary. (Use of scientific calculators is not allowed) PART-A I. Answer ALL of the following. (Each question carries 1 mark) 10x1=10 (Answer each question in one word or
Free Chemical reaction Chlorine Alcohol
Conveyor--belt http://www.yifancrusher.net/crusher/ Tape (belt) conveyor is widely used in cement‚ mining‚ metallurgy‚ chemical‚ foundry‚ building materials and other industries as well as the transportation and production lines hydropower station construction sites and port and other production departments to transport loose materials or items‚ sand and
Premium Conveyor belt
AN ORGANISATIONAL STUDY IN APOLLO TYRES LTD PERAMBRA A Project Report Submitted to Calicut University In partial fulfillment of the requirement for the award Of the Degree of BACHELOR OF BUSINESS ADMINISTRATION By SAJA.K.A Registration no: Under the guidance of SREEJA MISS Department Of Commerce& Management Studies ANSAR WOMEN’S COLLEGE PERUMPILAVU CERTIFICATE This is to certify that the mini project entitled “Organizational Study” is a bonafide record of the work done by SAJA.K.A‚ Registration
Premium Raw material Material Tire
&AN ORGANISATIONAL STUDY IN APOLLO TYRES LTD PERAMBRA A Project Report Submitted to Calicut University In partial fulfillment of the requirement for the award Of the Degree of BACHELOR OF BUSINESS ADMINISTRATION CONTENTS CHAPTER NO: TITLE page no:- 1 INTRODUCTION 1 2
Premium Material Raw material Tire
← Understand the manufacture of sulphuric acid. ← Synthesise the manufacture of ammonia and its salts. ← Understand alloys. ← Evaluate the uses of synthetic polymer. ← Apply the uses of glass and ceramics. ← Evaluate the uses of composite materials. ← Appreciate various synthetic industrial materiala. (H4SO4) ← USES OF SULPHURIC ACID 1. Sulphuric acid is used to produce chemical fertilizer such as ammonium sulphate and potassium sulphate‚ which are highly soluble in water
Premium Ammonia Sulfuric acid Sulfur dioxide
Part Ca)Up until the 1940’s rubber had only been obtained from the latex of rubber trees(Hevea brasiliensis) in plantations situated in tropical areas such as Malaya and Burma. The demand for rubber increased significantly during world war 2 as rubber was needed for tyres of military vehicles and the supply was interrupted by the conflict between the countries. Scientists in Germany and the US developed synthetic polymers that could replace rubber. Even after the war ended the traditional sources
Premium Sodium Sodium chloride Sodium hydroxide
EFFECTS OF AGING ON LANDMINES Introduction 1. The mine-intended as an active obstacle to stop‚ delay or impair enemy movement has always been an important combat support element. As a dangerous device‚ it has been viewed as a special weapon to be handled by combat engineer alone‚ who rarely publicize this unglamorous battle implement. Yet for a fraction of cost of the intended target‚ it can wreak devastating damage on to the target. Another imp though neglected virtue of the mine lies in very
Premium Ageing