These Charts show the thermal deformation temperature and the softening temperature (called the âVicat softening temperatureâ) of major plastics. The heat distortion temperature is the temperature when the test piece placed in the heat medium with bending load applied reaches a specified deflection as temperature rises. The Vicat softening temperature is defined as the temperature where the needle shaped penetrator sinks into the test piece to a specified depth as temperature of the heating medium rises and specified vertical load is applied to the test piece.
Puerto Rico is a territory (Commonwealth) of the United States of America and Puerto Ricans have common citizenship, currency and defense. Although Puerto Ricans are U.S. citizens, residents of Puerto Rico pay no federal income tax, nor can they vote in presidential elections.
1 People born in Puerto Rico are also considered native born because they are U.S. citizens by birth. 2  A small number of people of Puerto Rican originâ51,000âwere born outside of the U.S. or Puerto Rico and were not U.S. citizens by birth.3  They are considered foreign born.uerto Ricans are the second-largest population of Hispanic origin living in the United States, accounting for 9.5% of the U.S. Hispanic population in 2011. Mexicans, the nationâs largest Hispanic origin group, constituted 33.5 million, or 64.6%, of the Hispanic population in 2011.