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Sustainable rosin acid ester as internal electron donors in Ziegler-Natta catalysts for synthesis of isotactic polypropylene with high melt flow rate
Bio-derived rosin acid esters internal electron donors Ziegler-Natta catalyst polypropylene polymerization
2023/12/11
In this contribution, novel bio-derived rosin acid ester compounds have been developed and used as internal electron donors to prepare MgCl2?supported titanium catalysts for propylene polymerization. ...
Study on novel rosin-based polyurethane reactive hot melt adhesive
adhesion properties chain extender polyurethane reactive hot melt adhesive rosin
2023/12/11
Chain extender is a major additive in polyurethane adhesive preparation, which has a great influence on its molecular weight, green strength, and thermal resistance. In this work, we first synthesized...
Synthesis of Maleic-Modified Rosin Ester from Pine Rosin
Rosin modification Esterification Glycerol Diels-Alder Maleic
2023/12/11
Rosin is the major component of Pine sap that has a composition of up to 90%. Rosin is an organic compound that consists of diterpene tricyclic compounds with carboxyl functional group. The presence o...
Epoxy based hybrid nanocomposites: Fracture mechanisms, tensile properties and electrical properties
Epoxy Nanocomposite Fracture mechanics Nanoparticles Electrical properties
2023/12/11
This work explore the effect of addition of a combination of rigid nanofillers and core–shell rubber nanoparticles on the?fracture mechanics, tensile, electrical and thermo-mechanical properties of ep...
Natural fiber reinforced composites: Sustainable materials for emerging applications
Natural fibers Sustainable materials Sustainability Composite materials Chemical treatments
2023/12/11
In the contemporary world,?natural fibers?reinforced polymer composite (NFRPC) materials are of great interest owing to their eco-friendly nature, lightweight, life-cycle superiority,?biodegradability...
Biobased Dynamic Polymer Networks with Rapid Stress Relaxation
dynamic polymer networks epoxidized soybean oil hydroxyl-functionalized silica stress relaxation mechanical properties
2023/12/11
Dynamic polymer networks (DPNs) from epoxidized soybean oil (ESO) that incorporate dual dynamic exchange reactions (dual-DERs) and hydroxyl-functionalized silica (HO-SiO2) reinforcement are shown to e...
Sustainable alternative for bisphenol A epoxy resin high-performance and recyclable lignin-based epoxy vitrimers
Lignin Epoxy vitrimers Self-healing Shape memory polymer
2023/12/11
Epoxy vitrimers based on dynamic covalent bond chemistry have been developed in recent years as they can solve the problem of recycling and reuse for traditional thermosetting materials. Lignin as an ...
河南农业大学专利：一种利用阔叶材制备糠醛的方法
河南农业大学 阔叶材 糠醛 制备方法
2023/12/11
本发明公开了一种利用阔叶材制备糠醛的方法，包括以下步骤：步骤1：将阔叶材木粉、低共熔溶剂（DES）、有机溶剂以固液比为1:10:10加入反应釜中，搅拌进行反应；步骤2：反应结束后，将反应釜冷却；步骤3：冷却后，进行抽滤，收集滤液；步骤4：分离含有糠醛的有机相。本发明一种利用阔叶材制备糠醛的方法成本低，产量高，适合推广运用。
河南农业大学专利：一种木质素胶黏剂及其制备方法和应用
河南农业大学 木质素 胶黏剂 制备方法
2023/12/8
本发明公开了一种木质素胶黏剂及其制备方法和应用，其中，木质素胶黏剂的制备原料包括声敏材料和树脂；声敏材料包括姜黄素、二氧化钛、铁粉、金丝桃素、竹红菌素和叶绿素中的至少一种；树脂为木质素改性酚醛树脂。本发明提供的木质素胶黏剂，能够和微波固化方法相配合，有效提高其固化的速率和均匀程度，同时提升固化后胶黏剂和基材之间的胶接强度。本发明还提供了上述木质素胶黏剂的制备方法和应用。
“Solid-Liquid” Vitrimers Based on Dynamic Boronic Ester Networks
Solid-liquid Dynamic covalent bond Boronic ester bond Strain-rate dependent High stretchability
2023/12/8
The “solid-liquid” behavior of vitrimers have not been systematically investigated. Herein, a series of “solid-liquid” vitrimers bearing varying contents of dynamic boronic ester bonds were synthesize...
Bio-based vitrimer-like polyurethane based on dynamic imine bond with high-strength, reprocessability, rapid-degradability and antibacterial ability
Bio-based polyurethane Vitrimer-like Imine bond Rapidly-degradable Antibacterial property
2023/12/8
Synthesis of vitrimer with dynamic?covalent bond?is a surprising solution to overcome the inherent limitations of traditional?thermosets. A bio-based vitrimer-like?polyurethane?formed by?castor oil,?v...
Rapid self-healing and self-adhesive chitosan-based hydrogels by host-guest interaction and dynamic covalent bond as flexible sensor
Conductive hydrogel Chitosan Poly(vinyl alcohol) Host-guest interactions Self-healing Self-adhesiveness Flexible strain sensor
2023/12/8
A sensor used to monitor tissue deformation requires good flexibility, stretchability, self-adhesion, cyto-compatibility, and?antibacterial property. Here, we prepared hydrogel sensor based on?O-carbo...
High-strength and self-healable poly (acrylic acid) /chitosan hydrogel with organic-inorganic hydrogen bonding networks
Self-healing hydrogel Hydrogen bonding Organic-inorganic
2023/12/8
Bentonite?is a natural clay mineral with high cationic exchange properties and plays an important role in organic-inorganic composite hydrogels. We report an organic-inorganic cross-linked self-healin...
Cavitation dynamics in a vitrimer
Vitrimer Cavitation dynamics Strain stifening Viscoelasticity
2023/12/8
Vitrimer is a polymer network with dynamic covalent bonds, which can be dynamically broken and reformed. Thanks to the dynamic covalent bonds, vitrimer behaves like an elastomer at high deformation ra...