Results 51 to 60 of about 71,926 (343)

Organically Modified Montmorillonite as Nanoreactor to Improve the Grafting Degree of Maleic Anhydride onto Polypropylene

Journal of Chemistry, 2020
The application of an organically modified montmorillonite nanoreactor in the reactive extrusion process of the free radical grafting of maleic anhydride onto polypropylene (PP) can increase the MAH grafting degree on the PP.
Zhenghui Li, Peijie Yu, Lu Chen, Lingli Zhang, Hongyu Hu   +4 more
doaj   +1 more source

Thrombin and Factor Xa Hydrolysis of Chromogenic Substrates in the Presence of Sulfated Derivatives of Galactomannan and Galactoglucomannan Natural Gels

Pharmaceutics, 2022
Polysaccharides are important structural components of all plant species. Gel-like polysaccharides have found wide application in various fields, including medicine, construction, and the food industry.
Natalia N. Drozd, Svetlana A. Kuznetsova, Yuriy N. Malyar, Aleksandr S. Kazachenko, Valentina S. Borovkova, Yarosvala D. Berezhnaya   +5 more
doaj   +1 more source

Transdermal evaluation of caffeine in different formulations and excipients [PDF]

, 2013
Background: The stratum corneum(SC) forms adifficultphysical barrier fordrugs to pass through the skin. Several strategieswere developed to overcome this barrier.Optimization of topical drug formulations by selected excipients may facilitate the ...
Boonen, Jente, Burvenich, Christian, De Spiegeleer, Bart, Mehuys, Els, Peremans, Kathelijne, Remon, Jean Paul, Roche, Nathalie, Veryser, Lieselotte   +7 more
core   +2 more sources

Fluoride‐Free Adhesives for Low Surface Energy Fluorinated Substrates

Advanced Functional Materials, EarlyView.
A universal, fluoride‐free adhesive achieves a record 4.91 MPa bond strength on PTFE by leveraging amine/amide dipole–dipole interactions, without fluorinated components. This sustainable strategy overcomes the environmental and performance limits of PFAS‐based adhesives, enabling robust, eco‐conscious bonding across diverse materials.
Siqi Zheng, Yifeng Sheng, Shiqian Tan, Yuxuan Sun, Linling Li, He Zhu, Qi Zhang, Shiping Zhu   +7 more
wiley   +1 more source

Investigation of the effects of NaOH dopant level on the physical and mechanical properties of carbon/phenolic composite material [PDF]

, 1985
The near-catastrophic erosion of the STS-8A solid rocket booster nozzle was the instigating factor in the recent, and on-going, intensive investigation of carbon/phenolic composite materials.
Clinton, R. G., Jr.
core   +1 more source

Stereocomplex formation in ABA triblock copolymers of poly(lactide) (A) and poly(ethylene glycol) (B) [PDF]

, 1995
Two series of triblock copolymers of poly(ethylene glycol) (PEG, number-average molecular weight [bar M ]n = 6000) and poly(L-lactide) (PLLA) or poly(D-lactide) (PDLA) were prepared by ring-opening polymerization of lactide initiated by PEG end groups ...
Ankone, Marc J.K., Dijkstra, Pieter J., Feijen, Jan, Stevels, Willem M.   +3 more
core   +2 more sources

Switchable Supramolecular Adhesive by Tuning Interfacial Bonding and Modulus

Advanced Functional Materials, EarlyView.
The supramolecular adhesive (HyDiP) shows reversible adhesion and recyclability. In the dehydrated state, it is dense, stiff (E ≈445 MPa), transparent, and provides strong bonding with adhesion strengths up to 4.65 MPa. In the hydrated state, it becomes porous, soft (E ≈0.11 MPa), and detaches easily, enabling sustainable high‐strength applications ...
Rumin Fu, Cairong Xiao, Zihao Du, Changhong Linghu, Yongdong Shi, Chuyang Xiang, Mingxin Wan, Guoxin Tan, Limin Lu, Chengyun Ning, K Jimmy Hsia   +10 more
wiley   +1 more source

Photothermal Macroporous Lignin Cryogels for Off‐Grid, Continuous Atmospheric Water Collection via Interlayer Heat Recovery

Advanced Functional Materials, EarlyView.
Photothermal, macroporous lignin‐based cryogels are engineered to convert sunlight into low‐grade heat. Integrated as stacked beds in a drum‐type device, a thin copper interlayer transfers waste heat between beds, enabling interlayer heat recovery and continuous solar cycling.
Jie Yan, Jiqing Lu, Tian Bai, Lin Li, Zhaoxuan Niu, Yiying Yue, Wanli Cheng, Guangping Han, Orlando J. Rojas   +8 more
wiley   +1 more source

Determinação das constantes K e alfa da equação de Mark-Houwink de poli(p-acetóxiestireno) Determination of K and alpha constants of the Mark-Houwink equation of poly(p-acetoxystyrene)

Polímeros, 2004
O conceito de volume hidrodinâmico pode ser utilizado efetivamente com cromatografia de permeação em gel (GPC) e dados de viscosidade para calcular a massa molar de uma variedade de polímeros. Neste trabalho, as constantes da equação de Mark-Houwink para
José C. Moreira, Isabel F. da Silva, Shu Hui Wang, Debora T. Balogh   +3 more
doaj   +1 more source

Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance

Advanced Functional Materials, EarlyView.
A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer, Emilia Fulajtar, Seema Agarwal   +2 more
wiley   +1 more source