Bibliographic Details
| Title: |
Evidence of intra-chain phase separation in molten short-chain branched polyethylene. |
| Authors: |
Stadler, F. J.1 fjstadler@jbnu.ac.kr |
| Source: |
Express Polymer Letters. 2011, Vol. 5 Issue 4, p327-341. 15p. 1 Diagram, 1 Chart, 8 Graphs. |
| Subjects: |
Phase separation method (Engineering), Low density polyethylene, Polymers, Creep (Materials), Rheology |
| Abstract: |
Intramolecular phase separation is usually associated with block-copolymers, but the same phenomenon is also obtainable by random-copolymers. In this article, evidence of intramolecular phase separation is reported for a linear octadecene-ethene copolymer, which shows an evolving 'yield point' at a long time and low frequency. This is attributed to a partial phase separation of the long short-chain branches. In creep recovery, this behavior is evident as increasing elastic steady-state creep recovery compliance Je 0. In contrast to 'normal' block-copolymers, this special polymer has an increase in phase separation with temperature, which is caused by the chemical composition and the short chain segments in the side chain domain, leading to a high surface fraction. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
