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Showing 1 to 7 of 7 for “"cyclics"”.
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Linear, Branched and Crosslinked Polymers, Polyesters, Polyurethanes and Polymethacrylates Derived From Rotaxane Formation: Syntheses and Properties
… remains unidentified. To prevent threaded cyclics from slipping off the backbone during polycondensation, a diol blocking group (BG) and a diacid chloride BG were prepared and incorporated into polyesters as monomers or comonomers. Using these BG's effectively reduced or prevented …
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Analysis, Experimental Optimization and Chemical Synthesis of Cyclic Monomers Occurring in Edible Fats and Oils
… for the fast isolation of purified fractions of cyclics and through the development of empirical mathematical models for the prediction of the chromatographic retention characteristics of these compounds. In addition, the experimental optimization of the analytical method was achieved using …
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Preparation of Nitrile Containing Siloxane Triblock COpolymers and Their APplication As Stabilizers For Siloxane Magnetic Fluids
… molecular weights could be obtained. The major cyclics in the macroinitiator equilibrate are tetramer (8.6 ± 0.7 wt%), pentamer (6.3 ± 0.8 wt%) and hexamer (2.1 ± 0.5 wt%). 2.5k-2.5k-2.5k, 4k-4k-4k, and 8k-8k-8k triblock copolymers were prepared and characterized. These triblock copolymers are …
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DEMENTIA IN ELDERLY: PREDICTING AND PREVENTING RISK
… (SNRI (HR 1.12 (95% CI, 0.92-1.35), Modified Cyclics (HR 0.79 (0.57-1.10) and Tetracyclics (HR 1.15 (0.85-1.55) across different antidepressant classes with respect to risk of dementia. Conclusion: The late-life dementia risk index developed using readily available EMR database can be used in …
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Synand characterisation of silicone based mesophase forming materials.
… appear to applicable to the non-amphiphilic cyclics studied here. Thus, suitable flexible spacer groups will decouple the motions of mesogenic side-chains from those of an oligomeric cyclic backbone such that the mesogens may align. However, more efficient spacers are required to decouple the …
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Part I: Synthesis and Ring Opening Polymerization of Macrocyclic Monomers for Production of Engineering Thermoplastics
… driven by the large entropy difference between cyclics and linears; the second stage is very slow and is diffusion controlled due to the high viscosity created in the first stage reaction. The latter stage leads to incomplete polymerization at the low initiator concentrations (1-3 mol%). At high …
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Structure-Property Relationships of Polyester Regioisomers and Pendant Functionalized Polyetherimides
Step-growth polymerization enabled the synthesis of novel polyester regioisomers and pendant functionalized polyetherimides (PEI)s. Novel monomers incorporated at targeted mol % produced series of polyesters and PEIs, suitable for systematic analysis of key polymer properties. Subsequent …