Results 31 to 40 of about 23,237 (180)
Process of end-capping a polyimide system [PDF]
, 1985 A process of endcapping a polyimide system with an endcapping agent in order to achieve a controlled decrease in molecular weight and melt viscosity along with predictable fracture resistance of the molded products is disclosed.
Burks, H. D., Stclair, T. L.
core +1 more source
Macromolecular Rapid Communications, EarlyView.Metathesis‐derived cyclopentene epoxides enable strictly alternating, scrambling‐free ring‐opening copolymerization with phthalic thioanhydride, yielding well‐defined polythioesters with molecular weights up to ∼38 kg/mol. Their performance extends to oxygen‐based anhydrides and selective terpolymerizations. Direct comparisons with all‐oxygen analogues
Niracha Tangyen +3 more
wiley +1 more source
New Condensation polyimides containing 1,1,1-triaryl-2,2,2-trifluoroethane structures [PDF]
, 1989 The invention relates to a condensation polyimide containing a 1,1,1-triaryl 2,2,2-trifluoroethane structure and other related condensation polyimides.
Alston, William B., Gratz, Roy F.
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Enzymatic synthesis of betulinic acid ester as an anticancer agent: optimization study [PDF]
, 2010 Immobilized Candida antarctica lipase, Novozym 435, was used to catalyze the esterification reaction between betulinic acid and phthalic anhydride to synthesize 3-O-phthalyl betulinic acid in n-hexane/chloroform.
Abdul Rahman, Mohd Basyaruddin +3 more
core +1 more source
Packaging Technology and Science, EarlyView.Active packaging offers an effective approach to extending food shelf life. This review summarizes the past decade of progress in metal‐organic framework (MOF)‐based active food packaging, highlighting material selection, characterization, challenges, and future prospects.
Belladini Lovely +4 more
wiley +1 more source
Packaging Technology and Science, EarlyView.Utilisation of postconsumer recycled (PCR) plastic for food contact has safety concerns due to the potential presence of unapproved intentionally/non‐intentionally added substances, which can pose health and environmental risks if not removed during recycling.
Khairun Tumu +2 more
wiley +1 more source
Analytical Science Advances, Volume 7, Issue 1, June 2026.ABSTRACT This study investigated the prevalence of electronic smoking device (ESD) use and its associated behavioural and chemical risks among university students in Bahia, Brazil. A cross‐sectional survey was conducted with 355 students from public and private institutions through an online questionnaire between April and May 2023. Among participants,
Eduard F. Valenzuela +7 more
wiley +1 more source
Dynamic Covalent Polymeric Foams: En Route to a Sustainable Lightness
ChemSusChem, Volume 19, Issue 5, 13 March 2026.Dynamic covalent polymer foams (DCPFs) combine lightweight cellular structures with adaptive polymer networks, enabling self‐healing, reprocessability, and recyclability. By integrating reversible covalent bonds into foam architectures, these materials open new pathways toward sustainable porous polymers within a circular materials economy.
Antoine Adjaoud +3 more
wiley +1 more source
Crystal Engineering of Reticular Materials for Gas‐ and Liquid‐Phase Hydrocarbon Separation
Advanced Materials, Volume 38, Issue 16, 17 March 2026.Crystal engineering enables systematic study of structure/function relationships as exemplified by pore engineering of reticular sorbents, including porous coordination networks and covalent organic frameworks. This review assesses such studies applied across the full scope of industrially relevant hydrocarbon separations to provide insight into how ...
Xia Li +2 more
wiley +1 more source
Imide oligomers endcapped with phenylethynyl phthalic anhydrides and polymers therefrom [PDF]
, 1996 Controlled molecular weight phenylethynyl terminated imide oligomers (PETIs) have been prepared by the cyclodehydration of precursor phenylethynyl terminated amic acid oligomers.
Hergenrother, Paul M. +1 more
core +1 more source