QUANTIFICATION OF BRANCHING IN POLYETHYLENE BY C-13-NMR USING PARAMAGNETIC RELAXATION AGENTS

被引：7

作者：

PRASAD, JV

RAO, PVC

GARG, VN

机构：

[1] Research Centre, Indian Petrochemicals Corporation Ltd, Guiarat

来源：

EUROPEAN POLYMER JOURNAL | 1991年 / 27卷 / 03期

关键词：

D O I：

10.1016/0014-3057(91)90102-T

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The role of paramagnetic relaxation agents Cr(acac)3 and Fe(acac)3 and the effect of C-13-NMR instrumental conditions have been studied in quantification of branching in polyethylene. The addition of relaxation agent, with spectrometer set for gated decoupling mode and a pulse delay of 8.5 sec, has considerably shortened the experimentation time. Various grades of polyethylene have been analyzed for branching through computerized C-13-NMR under these conditions.

引用

页码：251 / 254

页数：4

共 22 条

[11] INVESTIGATION OF SHORT-CHAIN BRANCHES IN POLYETHYLENE BY PYROLYSIS GCMS [J].

HANEY, MA ;

JOHNSTON, DW ;

CLAMPITT, BH .

MACROMOLECULES, 1983, 16 (11) :1775-1783

[12]

HASAN MU, 1983, P C CHEM, V13, P139

[13] CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTROMETRY - CHEMICAL SHIFTS FOR PARAFFINS THROUGH C9 [J].

LINDEMAN, LP ;

ADAMS, JQ .

ANALYTICAL CHEMISTRY, 1971, 43 (10) :1245-&

[14]

RANDALL JC, 1973, J POLYM SCI POL PHYS, V11, P275, DOI 10.1002/pol.1973.180110209

[15] LONG-CHAIN BRANCHING IN POLYETHYLENE [J].

RUDIN, A ;

GRINSHPUN, V ;

ODRISCOLL, KF .

JOURNAL OF LIQUID CHROMATOGRAPHY, 1984, 7 (09) :1809-1821

[16] PYROLYSIS-GAS CHROMATOGRAPHIC ANALYSIS OF CHAIN BRANCHING IN POLYETHYLENE [J].

SEEGER, M ;

BARRALL, EM .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1975, 13 (07) :1515-1529

[17]

SHIRAYAMA K, 1972, MAKROMOLEKUL CHEM, V151, P97

[18] NATURAL ABUNDANCE C-13 NUCLEAR MAGNETIC-RESONANCE SPECTROMETRY FOR CRUDE-OIL AND PETROLEUM-PRODUCT ANALYSES [J].

SHOOLERY, JN ;

BUDDE, WL .

ANALYTICAL CHEMISTRY, 1976, 48 (11) :1458-1461

[19] IDENTIFICATION OF BRANCHES IN LOW-DENSITY POLYETHYLENES BY FOURIER-TRANSFORM INFRARED-SPECTROSCOPY [J].

USAMI, T ;

TAKAYAMA, S .

POLYMER JOURNAL, 1984, 16 (10) :731-738

[20] FINE-BRANCHING STRUCTURE IN HIGH-PRESSURE, LOW-DENSITY POLYETHYLENES BY 50.10-MHZ C-13 NMR ANALYSIS [J].

USAMI, T ;

TAKAYAMA, S .

MACROMOLECULES, 1984, 17 (09) :1756-1761

← 1 2 3 →