|
In chemistry, a trimer () (''tri-'', "three" + ''-mer'', "parts") is an oligomer derived from three identical precursors. An example is the procedure of production of polymers. At first, a monomer is made. By combining two monomers, a dimer is produced. With further additions, a trimer and eventually a polymer is made. Often, trimerization competes with polymerization; for example, dimethylsilanediol polymerizes to polydimethylsiloxane, even though a trimer is made: : Me2Si(OH)2 + (HO)2SiMe2 → Me2(OH)Si-O-Si(OH)Me2 – ''dimer'' : Me2(OH)Si-O-Si(OH)Me2 + (HO)2SiMe2 → Me2(OH)Si-O-SiMe2-O-Si(OH)Me2 – ''trimer'' : Me2(OH)Si-O-SiMe2-O-Si(OH)Me2 + (HO)2SiMe2 → Me2(OH)Si-O-SiMe2-O-SiMe2-O-Si(OH)Me2 – ''tetramer'' : et cetera, until Me2(OH)Si-O-()nSi(OH)Me2 (n>100) – ''polymer'' Trimers are typically cyclic. Chemical compounds that often trimerise are aliphatic isocyanates and cyanic acids. ==Trimerisation via breaking triple bond== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Trimer (chemistry)」の詳細全文を読む スポンサード リンク
|