𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Conformation of drawn poly(trimethylene terephthalate) studied by solid-state 13C NMR

✍ Scribed by Tsunenori Kameda; Mitsuhiro Miyazawa; Shigemitsu Murase

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
142 KB
Volume
43
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The change in the conformation of the flexible OCH~2~CH~2~CH~2~O segment of poly(trimethylene terephthalate) (PTT) monofilament caused by drawing was investigated by means of the γ‐gauche effect on the ^13^C solid‐state NMR chemical shift of the internal methylene carbon, combined with the NMR relaxations. The conformation around the OCH~2~ and CH~2~O bonds for as‐spun fiber was trans/trans. On drawing, followed by heat treatment, the conformation changed to gauche/gauche. The ratio of gauche/gauche to trans/trans for the drawn PTT fiber was determined quantitatively. Copyright © 2004 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Solid-State 13C NMR Study of Poly(vinyl
Solid-State 13C NMR Study of Poly(vinyl alcohol) Gels
✍ Simona Lai; Mariano Casu; Giuseppe Saba; Adolfo Lai; Ivan Husu; Giancarlo Masci; 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 226 KB

Poly(vinyl alcohol) (PVA) with 55% and 61% syndiotacticity, and their related dry and hydrated gels obtained by two different freeze-thawing cycles have been investigated using the solid-state 13C CP-MAS NMR technique. From a comparative analysis of the spectra, evidence was obtained that the gelati

Solid-state 13C NMR study of drugs: Aspi
Solid-state 13C NMR study of drugs: Aspirin
✍ Ching-Jer Chang; Luis E. Díaz; Frederick Morin; David M. Grant 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 468 KB
Phase transition of L-Ser monohydrate cr
Phase transition of L-Ser monohydrate crystal studied by 13C solid-state NMR
✍ Tsunenori Kameda; Hidetoshi Teramoto 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 351 KB

## Abstract We used gravimetric analysis (GA) and ^13^C solid‐state nuclear magnetic resonance (NMR) to study solid‐phase transition from the transparent single crystal of L‐serine (L‐Ser) monohydrate to a turbid powder. We found that L‐Ser monohydrate loses water molecules and transforms into an a

High-Resolution Solid-State 13C NMR Stud
High-Resolution Solid-State 13C NMR Studies of Poly[(R)-3-hydroxybutyric] Acid
✍ Farhod Nozirov; Zbigniew Fojud; Jacek Klinowski; Stefan Jurga 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 161 KB

Solid poly[(R)-3-hydroxybutyric] acid was examined by high-resolution 13C MAS NMR, differential scanning calorimetry and infrared spectroscopy. The 13C methyl group resonance consists of three components: the rigid amorphous phase, the crystalline phase and the mobile amorphous phase. Spectral decon

Hydrogen Bonding Structure and Stability
Hydrogen Bonding Structure and Stability of α-Chitin Studied by 13C Solid-State NMR
✍ Tsunenori Kameda; Mitsuhiro Miyazawa; Hiroshi Ono; Mitsuru Yoshida 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 94 KB

## Abstract **Summary:** The structure and stability of hydrogen bonds in __α__‐chitin were investigated by ^13^C solid‐state NMR measurements at different temperatures. Splitting of the carbonyl carbon signal for __α__‐chitin was interpreted as two types of hydrogen bonding; the peaks at 173.5 and