Blocked isocyanates: from analytical and experimental considerations to non-polyurethane applications
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TLDR
In this paper, the authors provide an introductory guide to blocked isocyanates, through discussion on different examples of blocking groups, along with experimental considerations for their application, and highlight the importance of matching the analytical technique to the application of the blocked Isocyanate, with differences in material state and experimental parameters having a great impact on the deblocking temperature reported.About:
This article is published in Polymer Chemistry.The article was published on 2016-12-06 and is currently open access. It has received 71 citations till now.read more
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Dynamic Covalent Polymer Networks: A Molecular Platform for Designing Functions beyond Chemical Recycling and Self-Healing.
TL;DR: In this article, the authors provide an overview of the above progress with particular focus on molecular design strategies for the exploitation of functional material properties, and point out the remaining issues and offer perspectives on how this class of materials can shape the future in ways that are complementary with classical thermoplastic and thermoset polymers.
Journal ArticleDOI
Dynamic covalent chemistry in polymer networks: a mechanistic perspective
TL;DR: In this article, a selection of such chemistries is highlighted, with a particular focus on the reaction mechanisms of molecular network rearrangements, and on how various mechanistic profiles can be related to the mechanical and physicochemical properties of polymer materials, in particular in relation with vitrimers, the recently defined third category of polymeric materials.
Journal ArticleDOI
Oxime-Based and Catalyst-Free Dynamic Covalent Polyurethanes
TL;DR: A new class of the PU-like dynamic covalent polymers, poly(oxime-urethanes) (POUs), which are prepared from the uncatalyzed polyaddition of multifunctional oximes and hexamethylene diisocyanate at ambient temperature are reported, showing efficient catalyst-free healable/recyclable properties.
Journal ArticleDOI
Effect of Sterics and Degree of Cross-Linking on the Mechanical Properties of Dynamic Poly(alkylurea–urethane) Networks
Longhe Zhang,Stuart J. Rowan +1 more
TL;DR: In this paper, the impact of steric hindrance of N-alkyl substituents and network connectivity in poly(alkylurea-urethane) dynamic network films was investigated.
Journal ArticleDOI
High-Performance Waterborne Polyurethane Coating Based on a Blocked Isocyanate with Cellulose Nanocrystals (CNC) as the Polyol
Reaz A. Chowdhury,Caitlyn M. Clarkson,Shikha Shrestha,Sami M. El Awad Azrak,Miran Mavlan,Jeffrey P. Youngblood +5 more
TL;DR: In this article, the inherent hygroscopic nature of CNCs hinders the use of such composites as organic coatings for metal surfaces, ceramics, and wood.
References
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Structural engineering of polyurethane coatings for high performance applications
TL;DR: A review of the development of high performance polyurethane (PU) and its subclass coatings can be found in this paper, where a wide variety of fillers, whiskers and fibers as well as clay and wollastonites with structural modification are described for use in nanocomposite PU coatings.
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On the Versatility of Urethane/Urea Bonds: Reversibility, Blocked Isocyanate, and Non-isocyanate Polyurethane
Etienne Delebecq,Jean-Pierre Pascault,Jean-Pierre Pascault,Bernard Boutevin,François Ganachaud,François Ganachaud,François Ganachaud +6 more
TL;DR: Isocyanate, and Non-isocyanates Polyurethane Etienne Delebecq, Jean-Pierre Pascault,‡,§ Bernard Boutevin,† and Franco̧is Ganachaud*,† are cited.
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Dynamic urea bond for the design of reversible and self-healing polymers
TL;DR: The rational design of hindered urea bonds are reported and the use of them to make polyureas and poly(urethane-ureas) capable of catalyst-free dynamic property change and autonomous repairing at low temperature is reported.
Journal ArticleDOI
Isocyanate-Free Routes to Polyurethanes and Poly(hydroxy Urethane)s.
TL;DR: This review details two main routes to phosgene-free and isocyanate-free pathways to polyurethanes: the transurethanization and the cyclic carbonate/amine routes.