Please fill in the blanks with appropriate words 1) Adding a small amount of                  to PVC can lower the Tg to -40C 2) Polytetrafluoroethylene (PTFE) has              melting point and            . melt viscosity makes it unsuitable for injection molding. 3) PTFE is widely used for                  ,                      ,                   4) Ultra high molecular weigh Polyethyle has two important properties                            ,              . As such it is used extensively for               ,             ,              5)                 is used to deliver carmustine (drug name), an anticancer drug to sites in the brain where a tumor has been removed.

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