This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: severance of the crosslink bonds and polymer degradation. 3) A) syndiotactic B) atactic C) isotactic 4) Linear and syndiotactic poly(vinyl chloride) will have a higher melting point with these conditions because according to Figure 11.48 when the molecular weights get so high even though they are different, they do not cause the melting points to differ at such a significant amount, so I simply used the data from Table 11.3 to come to this conclusion. 5) Schematic plots: 6) Small-angle grain boundaries are not as effective in interfering with the slip process as high-angle grain boundaries because as the angle gets bigger it makes it harder for the dislocation to change direction because it is more difficult as the amount of crystallographic disorientation increases. 7) A) 50 = (sigma) + 2k y (sigma) = 25 (when measuring in mm-1/2 ) k y = 12.5 B) With this given grain diameter I would predict the yield strength to be 225 MPa....
View Full Document
This note was uploaded on 09/21/2009 for the course MAT 033 taught by Professor Kiely during the Spring '07 term at Lehigh University .
- Spring '07