Use of intermolecular hydrogen bonding to synthesize triple-shape memory supermolecular composites

RSC Advances ◽  
2013 ◽  
Vol 3 (19) ◽  
pp. 7048 ◽  
Author(s):  
Hongmei Chen ◽  
Ye Liu ◽  
Tao Gong ◽  
Lin Wang ◽  
Keqing Zhao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Intermolecular Hydrogen Bonding ◽  
Triple Shape Memory

Intermolecular hydrogen bonding in developing nanostructured epoxy shape memory thermosets: Effects on morphology, thermo-mechanical properties and surface wetting

2020 ◽  
Vol 81 ◽  
pp. 106279 ◽  
Author(s):  
Jyotishkumar Parameswaranpillai ◽  
M.R. Sanjay ◽  
Suchart Siengchin ◽  
Sisanth Krishnan Sidhardhan ◽  
Seno Jose ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Shape Memory ◽  
Intermolecular Hydrogen Bonding ◽  
Surface Wetting

scholarly journals Triple-Shape Memory Polymers Based on Self-Complementary Hydrogen Bonding

2012 ◽  
Vol 45 (2) ◽  
pp. 1062-1069 ◽  
Author(s):  
Taylor Ware ◽  
Keith Hearon ◽  
Alexander Lonnecker ◽  
Karen L. Wooley ◽  
Duncan J. Maitland ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Shape Memory Polymers ◽  
Triple Shape Memory

Use of Quadruple Hydrogen Bonding as the Switching Phase in Thermo- and Light-Responsive Shape Memory Hydrogel

2021 ◽  
Author(s):  
Yufang Song ◽  
Yiming Chen ◽  
Ran Chen ◽  
Hongji Zhang ◽  
Dongjian Shi ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Shape Memory ◽  
Quadruple Hydrogen Bonding

scholarly journals In Situ Generation of Green Hybrid Nanofibrillar Polymer-Polymer Composites—A Novel Approach to the Triple Shape Memory Polymer Formation

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1900
Author(s):  
Ramin Hosseinnezhad ◽  
Iurii Vozniak ◽  
Fahmi Zaïri
Keyword(s):  
Polymer Blends ◽  
Shape Memory ◽  
Shape Memory Polymer ◽  
Cellulose Nanofibers ◽  
Polymeric Materials ◽  
Novel Approach ◽  
Phase Transition Temperatures ◽  
Triple Shape Memory

The paper discusses the possibility of using in situ generated hybrid polymer-polymer nanocomposites as polymeric materials with triple shape memory, which, unlike conventional polymer blends with triple shape memory, are characterized by fully separated phase transition temperatures and strongest bonding between the polymer blends phase interfaces which are critical to the shape fixing and recovery. This was demonstrated using the three-component system polylactide/polybutylene adipateterephthalate/cellulose nanofibers (PLA/PBAT/CNFs). The role of in situ generated PBAT nanofibers and CNFs in the formation of efficient physical crosslinks at PLA-PBAT, PLA-CNF and PBAT-CNF interfaces and the effect of CNFs on the PBAT fibrillation and crystallization processes were elucidated. The in situ generated composites showed drastically higher values of strain recovery ratios, strain fixity ratios, faster recovery rate and better mechanical properties compared to the blend.

scholarly journals Exploring the Structural Chemistry of Pyrophosphoramides: N,N′,N″,N‴-Tetraisopropylpyrophosphoramide

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 149-163
Author(s):  
Duncan Micallef ◽  
Liana Vella-Zarb ◽  
Ulrich Baisch
Keyword(s):  
Crystal Structure ◽  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Hydrogen Bonding ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Room Temperature ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
X Ray

N,N′,N″,N‴-Tetraisopropylpyrophosphoramide 1 is a pyrophosphoramide with documented butyrylcholinesterase inhibition, a property shared with the more widely studied octamethylphosphoramide (Schradan). Unlike Schradan, 1 is a solid at room temperature making it one of a few known pyrophosphoramide solids. The crystal structure of 1 was determined by single-crystal X-ray diffraction and compared with that of other previously described solid pyrophosphoramides. The pyrophosphoramide discussed in this study was synthesised by reacting iso-propyl amine with pyrophosphoryl tetrachloride under anhydrous conditions. A unique supramolecular motif was observed when compared with previously published pyrophosphoramide structures having two different intermolecular hydrogen bonding synthons. Furthermore, the potential of a wider variety of supramolecular structures in which similar pyrophosphoramides can crystallise was recognised. Proton (1H) and Phosphorus 31 (31P) Nuclear Magnetic Resonance (NMR) spectroscopy, infrared (IR) spectroscopy, mass spectrometry (MS) were carried out to complete the analysis of the compound.

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