Results 1 to 10 of about 196,223 (392)

Sustained Release Drug Delivery Applications of Polyurethanes

open access: yesPharmaceutics, 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

Thermoplastic polyurethane/(organically modified montmorillonite) nanocomposites produced by in situ polymerization

open access: diamondeXPRESS Polymer Letters, 2012
A series of polyurethane nanocomposites were synthesized from thermoplastic polyurethanes (with different hard segment ratios) and two types of organically modified montmorillonites (OMMT) – Cloisite® 10A and Cloisite® 20A.
M. Strankowski   +5 more
doaj   +2 more sources

Renewable natural resources as green alternative substrates to obtain bio-based non-isocyanate polyurethanes-review

open access: yesCritical Reviews in Environmental Science and Technology, 2019
Commercially available polyurethanes are synthesized by the polyaddition of diisocyanates with polyols and low molecular weight chain extenders. A new approach to polyurethanes synthesis is realized via non-isocyanate routes.
Kamila Błażek, Janusz Datta
exaly   +2 more sources

Candidate Polyurethanes Based on Castor Oil (Ricinus communis), with Polycaprolactone Diol and Chitosan Additions, for Use in Biomedical Applications

open access: yesMolecules, 2019
Polyurethanes are widely used in the development of medical devices due to their biocompatibility, degradability, non-toxicity and chemical versatility.
Yomaira L. Uscátegui   +6 more
doaj   +2 more sources

Lignin-Based Polyurethanes from Unmodified Kraft Lignin Fractionated by Sequential Precipitation [PDF]

open access: yesACS Applied Polymer Materials, 2019
Lignin-based polyurethanes were synthesized from three unmodified softwood Kraft lignin fractions as the primary hydroxyl group providers which constituted >40% of the polymeric materials.
Cai, Charles M   +3 more
core   +2 more sources

Polyurethanes [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 1988
M. Barikani
doaj   +2 more sources

New Aerogel Products for Construction Use: Product Specifications, Application Examples, Practical Aspects [PDF]

open access: yesE3S Web of Conferences, 2020
Two new high-performance insulation materials (HPIM) for the usage in buildings are presented. We show how to use and apply the upcoming aerogel products and give examples for structural details. While both materials achieve very low lambda values due to
Günther Eva   +4 more
doaj   +1 more source

Polyurethanes [PDF]

open access: yes, 2019
Hans-Ulrich Meier-Westhues   +3 more
semanticscholar   +3 more sources

Urethanases for the enzymatic hydrolysis of low molecular weight carbamates and the recycling of polyurethanes.

open access: yesAngewandte Chemie, 2023
Enzymatic degradation and recycling can reduce the environmental impact of plastics. Despite decades of research, no enzymes for the efficient hydrolysis of polyurethanes have been reported.
Yannick Branson   +8 more
semanticscholar   +1 more source

3D/4D Printing of Polyurethanes by Vat Photopolymerization

open access: yesAdvanced Materials & Technologies, 2023
Vat photopolymerization relies on the light‐induced polymerization of liquid photopolymer to produce the targeted structure. Among all the polymers prepared by vat photopolymerization, due to their numerous properties polyurethanes have recently gained ...
Jessica Mauriello   +3 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy