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- Title
Crystal transition behavior of odd-odd nylon 11,11 under annealing and stretching.
- Authors
Liu, Shaobing; Fu, Peng; Liu, Minying; Li, Zhaopeng; Lv, Zhengya; Zhao, Qingxiang
- Abstract
Nylon 11,11 is a new odd-odd polyamide with multiple crystalline structures. The wide-angle X-ray scattering indicated that the structure of quenched sample was not amorphous but a γ-form crystal with a relatively low crystallinity. The α-form and the γ-form crystal of nylon 11, 11 could be obtained by annealing the quenched samples at high and low temperature, respectively. No crystal transition happened for the α-form sample when annealed at any temperature before melting. However, the γ-form would quickly transform into the α-form when annealed above 145°C. Under the stretching conditions, the α-form rapidly transformed into the γ-form at low temperature, while the γ-form changed into the α-form only at high temperature. These results indicated that the stretching inducement was beneficial to produce the γ-form, and the thermal inducement was favorable to forming the α-form. POLYM. ENG. SCI., 54:2785-2790, 2014. © 2013 Society of Plastics Engineers
- Subjects
NYLON; POLYAMIDE fibers; CRYSTALS; ANNEALING of crystals; POLYAMIDES; CHEMICAL engineering; POLYMERS
- Publication
Polymer Engineering & Science, 2014, Vol 54, Issue 12, p2785
- ISSN
0032-3888
- Publication type
Article
- DOI
10.1002/pen.23829