MECHANISM OF ANIONIC-POLYMERIZATION OF (METH)ACRYLATES IN THE PRESENCE OF ALUMINUM ALKYLS .3. MALDI-TOF-MS STUDY ON THE VINYL KETONE FORMATION IN THE INITIATION STEP OF METHYL-METHACRYLATE WITH TERT-BUTYL LITHIUM

被引：17

作者：

SCHLAAD, H

MULLER, AHE

KOLSHORN, H

KRUGER, RP

机构：

[1] UNIV MAINZ,INST PHYS CHEM,D-55099 MAINZ,GERMANY

[2] UNIV MAINZ,INST ORGAN CHEM,D-55099 MAINZ,GERMANY

[3] BERLIN ADLERSHOF EV,INST ANGEW CHEM,D-12489 BERLIN,GERMANY

来源：

POLYMER BULLETIN | 1995年 / 35卷 / 1-2期

关键词：

D O I：

10.1007/BF00312910

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Methyl methacrylate was polymerized with tert-butyl lithium in the presence of triethylaluminium or triisobutylaluminium at -78 degrees C in toluene. As indicated by GPC and MALDI-TOF mass spectrometry, the polymerization is accompanied by side reactions. The lower oligomers were fractionated by distillation and characterised by NMR, FT-IR, UV and electron impact (EI) mass spectrometry. Ah these data show that part of the polymer chains are carrying exactly one tert-butyl isoprenyl ketone unit. In order to avoid the formation of tert-butyl isoprenyl ketone a molar ratio of A1/Li > 2 is necessary.

引用

页码：169 / 176

页数：8

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