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Cover Image, Volume 135, Issue 32
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46687
Subject(s) - die (integrated circuit) , cover (algebra) , process (computing) , stage (stratigraphy) , computer science , composite material , materials science , mechanical engineering , engineering , geology , paleontology , operating system
High oriented isotactic polypropylene (iPP) prepared by self‐designed two stage die drawing apparatus was explored by Qi Yang and colleagues through different kinds of methods. The results showed that there was a great difference between the orientation mechanism and structure evolution of two‐stage solid die drawing process and single stage solid die drawing process. Die drawing and free drawing process were of equal importance to single‐stage die drawing process while die drawing process showed a prominent contribution to the two‐stage die drawing process. Under the same processing condition, tensile strength and modulus of samples prepared by two‐stage die drawing process were higher than those prepared by single stage die drawing process. Moreover, two‐stage die drawing samples showed better dimensional stability than single‐stage die drawing samples especially under low draw rate. DOI: 10.1002/app.46581 .