Hydrogen bonding and crystalline structure of bio-based PA56

被引:35
作者
Yang, Tingting [1 ]
Gao, Yuanbo [1 ]
Wang, Xueli [2 ]
Ma, Bomou [2 ]
He, Yong [1 ,2 ]
机构
[1] Donghua Univ, Coll Mat Sci & Engn, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China
[2] Donghua Univ, Innovat Ctr Text Sci & Technol, Shanghai 201620, Peoples R China
关键词
Hydrogen bond; Crystalline structure; PA56; Variable temperature-FTIR; Solid-state C-13 NMR Variable; SOLID-STATE NMR; BRILL TRANSITION; INFRARED TEMPERATURE; C-13; NMR; POLYAMIDE; NYLON-6; DIRECTIONS; MORPHOLOGY; POLYMERS;
D O I
10.1016/j.polymer.2021.124356
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
PA56 is a newly commercialized bio-based polyamide with excellent thermal, mechanical and processing properties. However, its hydrogen bonds and crystalline structures are not well investigated yet. In this study, PA56 films with gamma form and alpha-like form crystalline phases were successfully prepared by melt-crystallization and solution casting, respectively. The hydrogen bond and crystalline structure were systematically studied with solid-state 13C NMR, variable temperature-FTIR and dynamic oscillatory rheological tests. 13C NMR and variable temperature-FTIR results indicate that the hydrogen bond strength of PA56 in alpha-like form crystal is higher than that in gamma-form, while both are lower than that of PA66 in alpha-form. The chemical shifts of carbons in diamine units are highly dependent on the crystalline forms due to the molecular chain of PA56 adopts different conformations in gamma-form and alpha-like form. The curve-fitting of variable temperature-FTIR spectra reveals that the melt crystallization results in gamma-form regardless of the crystal form before melt. Dynamic oscillatory rheological tests demonstrate that the stronger hydrogen bond interactions endow alpha-like form of PA56 a higher dynamic storage modulus and complex viscosity than gamma-form.
引用
收藏
页数:10
相关论文
共 39 条
[1]   Temperature-dependent crystalline structure and phase transition of poly(butylene adipate) end-functionalized by multiple hydrogen-bonding groups [J].
Bao, Jianna ;
Fan, Huabo ;
Xue, Xiaojia ;
Xie, Qing ;
Pan, Pengju .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2018, 20 (41) :26479-26488
[2]   Preferential Formation of β-Form Crystals and Temperature-Dependent Polymorphic Structure in Supramolecular Poly(L-lactic acid) Bonded by Multiple Hydrogen Bonds [J].
Bao, Jianna ;
Chang, Xiaohua ;
Xie, Qing ;
Yu, Chengtao ;
Shang, Guorong ;
Bao, Yongzhong ;
Pan, Pengju .
MACROMOLECULES, 2017, 50 (21) :8619-8630
[3]   Secondary transitions of aryl-aliphatic polyamides II.: High-resolution solid-state 13C NMR investigation [J].
Beaume, F ;
Lauprêtre, F ;
Monnerie, L .
POLYMER, 2000, 41 (08) :2989-2998
[4]   Investigation of the Brill transition in nylon 6,6 by Raman, THz-Raman, and two-dimensional correlation spectroscopy [J].
Bertoldo Menezes, D. ;
Reyer, A. ;
Musso, M. .
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2018, 190 :433-441
[5]   Advanced spectroscopy, microscopy, diffraction and thermal analysis of polyamide adhesives and prediction of their functional properties with solid-state NMR spectroscopy [J].
Bhullar, Kash A. ;
Meinel, Aaron ;
Maeder, Kennedy ;
Wuhrer, Richard ;
Gaborieau, Marianne ;
Castignolles, Patrice .
POLYMER CHEMISTRY, 2021, 12 (10) :1487-1497
[6]  
Caswell Hal, 2001, pi
[7]   In Situ SAXS and WAXD Investigations of Polyamide 66/Reduced Graphene Oxide Nanocomposites During Uniaxial Deformation [J].
Chi, Enyi ;
Tang, Yujing ;
Wang, Zongbao .
ACS OMEGA, 2021, 6 (17) :11762-11771
[8]   Preparation, characterization and crystalline transitions of odd-even polyamides 11,12 and 11,10 [J].
Cui, XW ;
Yan, DY .
EUROPEAN POLYMER JOURNAL, 2005, 41 (04) :863-870
[9]   Crystalline structure of polyamide 12 as revealed by solid-state 13C NMR and synchrotron WAXS and SAXS [J].
Dencheva, N ;
Nunes, TG ;
Oliveira, MJ ;
Denchev, Z .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2005, 43 (24) :3720-3733
[10]   Dissolution and Crystallization of Polyamides in Superheated Water and Concentrated Ionic Solutions [J].
Deshmukh, Yogesh S. ;
Graf, Robert ;
Hansen, Michael Ryan ;
Rastogi, Sanjay .
MACROMOLECULES, 2013, 46 (17) :7086-7096