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UPVC WINDOWS PLYMOUTH

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Plymouth (ˈplɪməθ (help·info)) is a city and unitary authority area in Devon, England, about 190 miles (310 km) south west of London. Plymouth is the second biggest city on the south coast of England by population after Brighton and Hove, ahead of cities such as Portsmouth and Southampton. By area Plymouth is bigger than Brighton. It is built between the mouths of the rivers Plym and Tamar, where they join Plymouth Sound. Since 1967 the unitary authority of Plymouth has included the suburbs of Plympton and Plymstock, which are on the east side of the River Plym. Plymouth’s history goes back to the Bronze Age, when its first settlement grew at Mount Batten. This settlement continued to grow as a trading post for the Roman Empire, until the more prosperous village of Sutton, the current Plymouth, surpassed it. In 1620 the Pilgrim Fathers left Plymouth for the New World, establishing the first colony of the United States of America. During the English Civil War the town was held by the Parliamentarians and was besieged between 1642 and 1646. Throughout the Industrial Revolution Plymouth grew as a major shipping port, handling imports and passengers from the Americas and the construction of ships, ranging from small fishing boats to battleships for the Royal Navy. This later led to its targeting and partial destruction during World War Two, an act known as the Plymouth Blitz. After the war the city centre was completely rebuilt. Today the city is home to nearly 250,000 people, making it the 15th most populous city in England. It has its own city council and is represented nationally by three MPs. Plymouth’s economy is still strongly influenced by shipbuilding, but has since the 1990s become a more service-based economy with the 11th largest university in the United Kingdom. Its naval base, HMNB Devonport is the largest operational naval base in Western Europe. Plymouth has ferry links to France and Spain and an airport with international services.

History Polyvinyl chloride was accidentally discovered on at least two different occasions in the 19th century, first in 1835 by Henri Victor Regnault and in 1872 by Eugen Baumann. On both occasions, the polymer appeared as a white solid inside flasks of vinyl chloride that had been left exposed to sunlight. In the early 20th century, the Russian chemist Ivan Ostromislensky and Fritz Klatte of the German chemical company Griesheim-Elektron both attempted to use PVC (polyvinyl chloride) in commercial products, but difficulties in processing the rigid, sometimes brittle polymer blocked their efforts. In 1926, Waldo Semon and the B.F. Goodrich Company developed a method to plasticize PVC by blending it with various additives. The result was a more flexible and more easily-processed material that soon achieved widespread commercial use.

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