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 is the capital and largest city of Greece. Athens dominates the Attica region and is one of the world's oldest cities, with its recorded history spanning over 3,400 years and its earliest human presence starting somewhere between the 11th and 7th millennium BC. Classical Athens was a powerful city-state that emerged in conjunction with the seagoing development of the port of Piraeus, which had been a distinct city prior to its 5th century BC incorporation with Athens. A centre for the art