Results 11 to 20 of about 14,658 (303)
Sustained Release Drug Delivery Applications of Polyurethanes
Pharmaceutics, 2018 Since their introduction over 50 years ago, polyurethanes have been applied to nearly every industry. This review describes applications of polyurethanes to the development of modified release drug delivery.
Michael B. Lowinger +3 more
doaj +2 more sources
Applied Sciences, 2012 Shape memory polyurethanes (SMPUs) are typically synthesized using polyols of low molecular weight (MW~2,000 g/mol) as it is believed that the high density of cross-links in these low molecular weight polyols are essential for high mechanical strength ...
Manzoor Ahmad +6 more
doaj +2 more sources
, 2021 Over 80% of all chronic bacterial infections in humans are associated with biofilms, which are surface-associated bacterial communities encased within a secreted exopolysaccharide matrix that can provide resistance to environmental and chemical insults ...
Abraham, Joy +4 more
core +1 more source
Synthesis of Stereocontrolled Polyurethanes with Defined Monomer Order by Step-economy Approach
, 2023 Polyurethanes are valuable materials in the industrial sector due to their broad scope of various applications. Traditional synthesis methods rely on step-growth polymerization, which inherently lacks precise molecular weight and structure control ...
Vijaj, Gupta +3 more
core +1 more source
Asymmetrically Substituted s‐Triazine Phosphonates by One‐Step Synthesis
ChemistryOpen, 2023 Asymmetrically substituted s‐triazine phosphonates with up to three different phosphonate groups C3N3RR'R” with R, R’, R”=PO(OR”’) and R”’=for example, methyl, ethyl, isopropyl or n‐butyl are interesting as polymer additives like flame retardants ...
Claudia Vogt +5 more
doaj +1 more source
Degradability of cross-linked polyurethanes/chitosan composites [PDF]
, 2017 Polyurethanes with synthetic poly([R,S]-3-hydroxybutyrate) in the soft segment and with polycaprolactone triol as cross-linker were blended with chitosan and degraded in hydrolytic and oxidative solutions.
Rutkowska, Maria +20 more
core +1 more source
Applied Sciences, 2019 Two series of rigid polyurethane-polyisocyanurate foams (RPU/PIR) modified by cinnamon extract (series C_0t and CU_0t) were obtained. One RPU/PIR series contained a commercial flame retardant (C_0t) in the formulation.
Joanna Liszkowska +5 more
doaj +1 more source
Effect of Glycerol in Soft and Hard Segments on Properties of Shape Memory Polyurethane [PDF]
علوم و تکنولوژی پلیمر, 2023 Hypothesis: Chemical cross-linked shape memory polyurethanes (CSMPUs) can have various applications in different fields such as medicine, where mechanical behavior and shape memory are improved in these samples compared to linear shape memory ...
Mahdi Sakhavi +3 more
doaj +1 more source
Science and Technology of Advanced Materials, 2020 We report the dynamic behavior of diselenide-containing hydrophilic polyurethanes and hydrogels based on diselenide exchange reactions in an aqueous media.
Hao Xu +6 more
doaj +1 more source
Thermal Stability of Aqueous Polyurethanes Depending on the Applied Catalysts
Sensors, 2006 The thermal stability of aqueous polyurethanes has been measured applying thethermogravimetric analysis. The aqueous polyurethanes (aqPUR) with catalysts of differentselectivity have been studied by use of the dynamic method.
Miroljub Barac +6 more
doaj +1 more source