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Trimethylolpropane triglycidyl ether (TMPTGE) is an organic chemical in the glycidyl ether family. [2] [3] It has the formula C 15 H 26 O 6 and the IUPAC name is 2-[2,2-bis(oxiran-2-ylmethoxymethyl)butoxymethyl]oxirane, and the CAS number 3454-29-3.
The Flory–Fox equation relates the number-average molecular weight, M n, to the glass transition temperature, T g, as shown below: =, where T g,∞ is the maximum glass transition temperature that can be achieved at a theoretical infinite molecular weight and K is an empirical parameter that is related to the free volume present in the polymer sample.
The systematic IUPAC name of the prototypical unsubstituted monomer is 3,4-dihydro-3-phenyl-2H-1,3-benzoxazine. Benzoxazines are products of condensation between an amine, a phenol and formaldehyde, used to produce thermoset resins or thermosetting polymer.
The relative amount of each isomer in the polymer is dependent on the mechanism of the polymerization reaction. [citation needed] Anionic chain polymerization, which is initiated by n-Butyllithium, produces cis-1,4-polyisoprene dominant polyisoprene. 90–92% of repeating units are cis-1,4-, 2–3% trans-1,4- and 6–7% 3,4-units. [3]
[1] [2] [3] For example, with the use of electrospinning, the flexible nature of PDS allows the control of its structure and can be used in applications such as tissue scaffolding. [4] It is degraded by hydrolysis, and the end products are mainly excreted in urine, the remainder being eliminated by the digestive system or exhaled as CO 2. The ...
In the example, there is a bromo-substituted -CH 2-CH 2 - subunit. 1-Bromoethane-1,2-diyl is chosen in preference to 2- bromoethane-1,2-diyl as the former has a lower locant for the bromo-substituent. The preferred CRU is therefore oxy(1-bromoethane-1,2-diyl) and the polymer is thus named poly[oxy(1-bromoethane-1,2-diyl)].
[4] [5] Such conventions include a constant cooling rate (20 kelvins per minute (36 °F/min)) [2] and a viscosity threshold of 10 12 Pa·s, among others. Upon cooling or heating through this glass-transition range, the material also exhibits a smooth step in the thermal-expansion coefficient and in the specific heat , with the location of these ...
That is, is the total number of polymer segments (monomers) in the solution, so is the number of nearest-neighbor sites to all the polymer segments. Multiplying by the probability ϕ 1 {\displaystyle \phi _{1}} that any such site is occupied by a solvent molecule, [6] we obtain the total number of polymer-solvent molecular interactions.