The cyanuric acid–biuret co-crystal: a new type of hydrogen-bonded system formed between a molecule and its solution-phase decomposition product

1991 ◽  
pp. 1781-1784 ◽  
Author(s):  
Neil M. Stainton ◽  
Kenneth D. M. Harris ◽  
R. Alan Howie
Keyword(s):  
Decomposition Product ◽  
Cyanuric Acid ◽  
Solution Phase ◽  
Phase Decomposition ◽  
New Type ◽  
Hydrogen Bonded

Dual macrocyclic chemical input based highly protective molecular keypad lock using fluorescence in solution phase: A new type approach

2021 ◽  
pp. 115679
Author(s):  
Monaj Karar ◽  
Provakar Paul ◽  
Rajib Mistri ◽  
Tapas Majumdar ◽  
Arabinda Mallick
Keyword(s):  
Solution Phase ◽  
New Type

Surface self-assembly of the cyanuric acid–melamine hydrogen bonded network

2006 ◽  
pp. 538-540 ◽  
Author(s):  
Luís M. A. Perdigão ◽  
Neil R. Champness ◽  
Peter H. Beton
Keyword(s):  
Self Assembly ◽  
Cyanuric Acid ◽  
Hydrogen Bonded

Dynamics of a hydrogen-bonded linear chain with a new type of one-particle potential

1996 ◽  
Vol 8 (23) ◽  
pp. 4325-4338 ◽  
Author(s):  
Henryk Konwent ◽  
Pawel Machnikowski ◽  
Andrzej Radosz
Keyword(s):  
Linear Chain ◽  
Particle Potential ◽  
New Type ◽  
Hydrogen Bonded

Pressure-Induced Phase Transition in Hydrogen-Bonded Supramolecular Adduct Formed by Cyanuric Acid and Melamine

2009 ◽  
Vol 113 (44) ◽  
pp. 14719-14724 ◽  
Author(s):  
Kai Wang ◽  
Defang Duan ◽  
Run Wang ◽  
Dan Liu ◽  
Lingyun Tang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Cyanuric Acid ◽  
Supramolecular Adduct ◽  
Hydrogen Bonded

Influence of hard segments content on thermal, morphological and mechanical properties of homo and co-polyurethanes: a comparative study

2021 ◽  
Vol 1 (109) ◽  
pp. 5-16
Author(s):  
Z.K. Alobad ◽  
M. Albozahid ◽  
H.Z. Naji ◽  
H.S. Alraheem ◽  
A. Saiani
Keyword(s):  
Mechanical Properties ◽  
Ethylene Glycol ◽  
Exothermic Peak ◽  
Thermoplastic Polyurethanes ◽  
Main Challenge ◽  
New Type ◽  
Hard Segments ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Hydrogen Bonded

Purpose: This work aims to study the effect of hard segments (HS) content on the thermal, morphological and mechanical properties of polyurethane polymers based on 1.5 pentanediol chain extenders. Design/methodology/approach: Two comparable series of polyurethanes were synthesised including homo-polyurethane (Homo-PU) and copolyurethane (Co-PU). The Homo-PU consists of 100% wt. of hard segments (HS). The Co-PU composes of 30%wt. of soft segments (SS) using a poly(ethylene glycol)-block-poly(propylene glycol)-blockpoly( ethylene glycol) material. The effect of hard segments content on the morphology of Homo-PU and Co-PU was also studied. Findings: The Homo-PU and Co-PU materials show three distinct degradation steps with the higher thermal stability of the Co-PU compared to the Homo-PU. Enthalpy of fusion (ΔHM) and heat capacity (ΔCP) of polyurethane (PU) samples decrease with decreasing HS content. In the cooling cycle, the higher exothermic peak of crystallization is observed in the Co-PU. In contrast, the cold crystalline peak is observed in the 2nd heating cycle of the Homo-PU. Melting temperature (TM) increases with increasing SS content. Glass transition temperature (Tg) of PU samples shifts to higher temperature with increasing HS content. Storage modulus (E’) of the Co-PU is higher than E’ of the Homo-PU. All N-H groups in PU samples are hydrogen-bonded, whilst most of the C=O groups are hydrogen-bonded. The degree of hydrogen bonding in PU samples decreases with decreasing HS content. The Homo-PU shows better hardness than the Co-PU and higher brittleness at low temperature. WAXS results of the Homo-PU display better crystallinity compared to the Co-PU. Research limitations/implications: The main challenge in this work was how to synthesis Thermoplastic polyurethanes (TPUs) with specific properties to compete other common polymer such as Polyamides (PA) and Polypropylene (PP).Practical implications: Thermoplastic polyurethanes (TPUs) can be used in various application such as backageing, foot,automobiles and constructions. Originality/value: A new type of TPUs that synthesized using different type of chain extender (1.5 pentanediol). Two different types of TPUs were synthesized one contained 30% SS and 70% HS and a second one contained 100% HS.

Cyanuric Acid and Melamine on Au(111): Structure and Energetics of Hydrogen-Bonded Networks

Small ◽  
2007 ◽  
Vol 3 (5) ◽  
pp. 854-858 ◽  
Author(s):  
Wei Xu ◽  
Mingdong Dong ◽  
Henkjan Gersen ◽  
Eva Rauls ◽  
Socorro Vázquez-Campos ◽  
...  
Keyword(s):  
Cyanuric Acid ◽  
Hydrogen Bonded

Design and synthesis of hydrogen-bonded aggregates. Theory and computation applied to three systems based on the cyanuric acid-melamine lattice

Tetrahedron ◽  
1995 ◽  
Vol 51 (2) ◽  
pp. 607-619 ◽  
Author(s):  
Eric E Simanek ◽  
Mathai Mammen ◽  
Dana M Gordon ◽  
Donovan Chin ◽  
John P Mathias ◽  
...  
Keyword(s):  
Cyanuric Acid ◽  
Design And Synthesis ◽  
Hydrogen Bonded
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