tetramethylene


Also found in: Dictionary, Wikipedia.
Related to tetramethylene: Tetramethylene oxide, Tetramethylenediamine

tetramethylene

[¦te·trə′meth·ə‚lēn]
(organic chemistry)
References in periodicals archive ?
These multiblock thermoplastic elastomers are synthesized, for example, from dimethyl terephthalate, poly(tetramethylene ether glycol) and tetramethylene glycol via a trans-esterification reaction in the melt using titanium catalysts.
The literature methods describe the use of several polar modifiers such as dipiperdinoethan (DIPE), tetramethylene diamine (TMEDA) and 2,2-(di-terahydrofuran propane) in an organic lithium catalyst system.
Tenders are invited for supply of ethylene diamine tetramethylene phosphonic acid
Polyether-ester thermoplastic elastomers (TPE) based on polybutylene terephthalate (PBT) hard segment and tetramethylene ether (PTMO) soft segments constitute an important class of medical elastomers because of their wide property range, solvent bonding capability, oxidative stability, and processing ease.
Thermoplastic polyesters have hard segments based largely on crystalline tetramethylene terephthalate (4GT) repeat units and low Tg rubbery segments consisting of poly (tetramethylene oxide) glycol (PTMO) (ref.
Copolymers are readily prepared by melt copolymerization of dimethyl terephthalate, the high molecular weight glycol and excess tetramethylene glycol.
In the first step, we synthesized tetramethylene bis(orthophosphate) (TBOP) that contained two phosphorus functional groups in one structural unit.
To do this, we first synthesized tetramethylene bis(orthophosphate) intermediate (TBOP) from pyrophosphoric acid and 1,4-butanediol.
and tetramethylene bis(orthophosphate) (TBOP, synthesized and purified in our lab).
Ethylene < tetramethylene < hexamethylene < octamethylene < decamethylene.
Photolysis studies of various methylene spacer containing polymers revealed that the rate of photocrosslinking of exocyclic double bonds of the polymers increases in the following order: ethylene < tetramethylene < hexamethylene < octamethylene < decamethylene.