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 recognised as a global city because of its geo-strategic location and its importance in shipping, finance, commerce, media, entertainment, arts, international trade, culture, education and tourism.he Athens Metro is more commonly known in Greece as the Attiko Metro (Greek: Î±ÏÏÎ¹ÎºÏ MÎµÏÏÏ) and provides public transport throughout the Athens Urban Area. While its main purpose is transport, it also houses Greek artifacts found during construction of the system.