Heat Distortion Temperature (softening temperature) The molecular structure of PVC is made of continuous carbon- carbon single bonds in the main chain. As this main chain is highly flexible, PVC products have the disadvantage of having a low heat distortion temperature (softening temperature) compared with other plastics of the similar molecular structure.
This philosophy greatly impacted the Greek civilization. Athens was the intellectual center of Greece. It was one of the first city-states of its time, and is still world renowned as one of the most famous cities in the world. It was named after Athena, the goddess of wisdom and the city's patron.his philosophy greatly impacted the Greek civilization. Athens was the intellectual center of Greece. It was one of the first city-states of its time, and is still world renowned as one of the most famous cities in the world. It was named after Athena, the goddess of wisdom and the city's patron.
Athens met times of bloom and decline, but still shines under the Attic sky gazing the future. Still sparkling like the marbles of Parthenon and the limpid white of Pentelic marble. Athens is situated in the prefecture of Attica and extends to the peninsula that reaches up to Central Greece. It is surrounded by mountains Ymmytos, Pendeli and Parnitha, northwards and eastwards, and the Saronic gulf southwards and westwards.