Proton NMR study of molecular motion in bulk and in highly drawn fiber polyamide-6

Blinc R; Apih T; Jeglic P; Emri I; Prodan T

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Proton NMR study of molecular motion in bulk and in highly drawn fiber polyamide-6

机译：本体和高拉伸纤维聚酰胺6中分子运动的质子NMR研究

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The proton motion in bulk and highly drawn fiber polyamide-6 has been studied by field cycling relaxometry and proton line shape measurements. The dips in the T, dispersion allowed for the determination of the "N quadrupole coupling tensor. The fact that only one set of "N nuclear quadrupole resonance lines has been found shows that all N-H groups in nylon-6 are H-bonded. A striking difference in the main line width transition and the low-frequency molecular dynamics has been observed between a slowly cooled "bulk" polyamide-6 sample and a rapidly cooled and highly drawn "fiber" sample by wide line proton nuclear magnetic resonance line shape and spin-lattice relaxation time measurements. This result is consistent with the picture that shearing melt processing procedures, such as spinning, plant stable and long-lived crystallization nuclei into the amorphous phase which impose additional motional constraints on the surroundings and inhibit the self-diffusion process.

机译：已通过场循环弛豫法和质子线形状测量研究了散装和高拉伸纤维聚酰胺6中的质子运动。 T，色散的下降允许确定“ N个四极偶合张量”。仅发现一组“ N个核四极共振线”的事实表明尼龙6中的所有N-H基团都是H键合的。通过宽线质子核磁共振线形观察到，在缓慢冷却的“散装”聚酰胺-6样品与快速冷却且高度拉伸的“纤维”样品之间，主线宽度过渡和低频分子动力学存在显着差异。和自旋晶格弛豫时间测量。该结果与图片相吻合，即剪切熔体加工程序，如纺丝，植物稳定且长寿命的结晶核进入非晶态，这对周围环境施加了额外的运动约束，并抑制了自扩散过程。

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《Applied Magnetic Resonance》 |2005年第4期|共12页
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Blinc R; Apih T; Jeglic P; Emri I; Prodan T;
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中图分类电磁学、电动力学;
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1. Proton NMR study of molecular motion in bulk and in highly drawn fiber polyamide-6 [J] . Blinc R, Apih T, Jeglic P, Applied Magnetic Resonance . 2005,第4期

机译：本体和高拉伸纤维聚酰胺6中分子运动的质子NMR研究
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3. Molecular motions of alpha-L-rhamnopyranose and methyl alpha-L-rhamnopyranoside in the glassy and crystalline states:A proton NMR study [J] . H.R.Tang, Y.L.Wang, P.S.Belton Physical chemistry chemical physics: PCCP . 2004,第13期

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4. AFM analysis of the Surface of Highly Drawn Ultra High Molecular Weight Polyethylene Fibers [C] . Joseph Deitzel, Preston McDaniel, John W. Gillespie Jr. Annual conference of the North American Thermal Analysis Society . 2014

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5. Model Development and Application of Molecular Simulations for the Study of Proton Transport in Bulk Water and for the Prediction of Dipole Moments of Organic Compounds. [D] . Asthana, Abhishek. 2012

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6. Catalytic mechanism of human UDP-glucose 6-dehydrogenase: in situ proton NMR studies reveal that the C-5 hydrogen of UDP-glucose is not exchanged with bulk water during the enzymatic reaction [O] . Thomas Eixelsberger, Lothar Brecker, Bernd Nidetzky -1

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7. Proton exchange and molecular orientation of water in hydrated collagen fibers. An NMR study of H2O and D2O [O] . C. Migchelsen, H. J. C. Berendsen 1973

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8. Complex Molecular Motions in Bulk Hard Segment Polyurethanes - A Deuterium NMR Study [R] . Kintanar, A., Jelinski, L. W., Gancarz, I., 1985

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Proton NMR study of molecular motion in bulk and in highly drawn fiber polyamide-6

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