Malleable and Sustainable Poly(ester amide) Networks Synthesized via Melt Condensation Polymerization

Abstract

Polymers synthesized directly from plant oils such as castor oil usually exhibit poor mechanical properties and cannot be reprocessed due to the soft, highly cross-linked and permanent cross-linking structures. Herein, we report a novel approach to synthesize high performance and malleable polymer networks, namely poly­(ester amide) vitrimers, from castor oil via melt condensation polymerization with sebacic acid, polyamide 1010 monomer salt and 4-aminophenyl disulfide. 4-Aminophenyl disulfide with excellent thermal stability is applicable for high temperature polymerization and endows the poly­(ester amide) network with malleability. Polyamide 1010 segments introduced by polyamide 1010 monomer salt endow the poly­(ester amide) network with improved and tunable mechanical properties. This investigation demonstrates a new powerful strategy for developing high performance and reprocessable polymer networks from plant oils.

Effect of special structure of clam shell powder on structure and properties of castor oil‐based composites

“…[10][11][12][13][14][15] In addition, CO-based polyurethane networks show some appealing properties such as flexibility and water resistance. 4,6,16,17 Over the years, CO and isocyanate have been used to prepare CO-based polyurethane and castor oil-based polyurethane prepolymer (COPU) under certain conditions. 17,18 The ensued CO-based polyurethane materials exhibited some attractive properties such as water resistance and flexibility.…”

“…4,6,16,17 Over the years, CO and isocyanate have been used to prepare CO-based polyurethane and castor oil-based polyurethane prepolymer (COPU) under certain conditions. 17,18 The ensued CO-based polyurethane materials exhibited some attractive properties such as water resistance and flexibility. 9 Furthermore, COPU has found wide range of applications such as compatibilizers, 16 flexible modifiers, 18 and adhesives for preparing composite materials.…”

“…9 Furthermore, COPU has found wide range of applications such as compatibilizers, 16 flexible modifiers, 18 and adhesives for preparing composite materials. 17 This is mainly because COPU has a flexible long chain that can be used as a modifier to achieve Peirui Zhang and Fangqing Weng contributed equally to this work. flexibility in materials.…”

“…flexibility in materials. [16][17][18] On the other hand, by adjusting the ratio of CO to isocyanate to 1: 2, a terminal active -NCO group in polyurethane prepolymer can be obtained which can be manipulated further to form chemical bonds with other polymers to access valuable materials. 19 For example, Yao et al 20 have used isophorone diisocyanate (IPDI) and polyethylene glycol (PEG) to synthesize ethoxylated prepolymers.…”

“…Despite these significant achievements, CO-based polyurethane materials are still not suitable for structural applications due to the poor mechanical properties. 16,17 To the best of our knowledge, the preparation of high strength and high toughness CO-based polyurethane composites have not been found. Consequently, we aimed to prepare highstrength composite material using COPU.…”