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

收藏

页码：251 / 254

页数：4

相关论文

共 22 条

[1] SHORT-CHAIN AND LONG-CHAIN BRANCHING IN LOW-DENSITY POLYETHYLENE [J].

BOVEY, FA ;

SCHILLING, FC ;

MCCRACKIN, FL ;

WAGNER, HL .

MACROMOLECULES, 1976, 9 (01) :76-80

[2] NATURE OF SIDE-CHAIN BRANCHES IN LOW-DENSITY POLYETHYLENE - VOLATILE PRODUCTS FROM GAMMA-RADIOLYSIS [J].

BOWMER, TN ;

ODONNELL, JH .

POLYMER, 1977, 18 (10) :1032-1040

[3] LONG-CHAIN BRANCHING INDEXES OF LOW-DENSITY POLYETHYLENES FROM SIZE EXCLUSION CHROMATOGRAPHY AND C-13-NMR SPECTROSCOPY [J].

BUGADA, DC ;

RUDIN, A .

EUROPEAN POLYMER JOURNAL, 1987, 23 (11) :847-850

[4] C-13 NUCLEAR MAGNETIC-RESONANCE OBSERVATION OF OXIDATION OF POLYETHYLENE [J].

CHENG, HN ;

SCHILLING, FC ;

BOVEY, FA .

MACROMOLECULES, 1976, 9 (02) :363-365

[5]

CHENG HN, 1983, POLYM B, V16, P445

[6] DETERMINATION OF CHAIN-BRANCHING IN LOW-DENSITY POLYETHYLENE BY C-13 NUCLEAR MAGNETIC-RESONANCE AND INFRARED SPECTROSCOPY [J].

CUDBY, MEA ;

BUNN, A .

POLYMER, 1976, 17 (04) :345-347

[7] C-13 OBSERVATIONS OF NATURE OF SHORT-CHAIN BRANCHES IN LOW-DENSITY POLYETHYLENE [J].

DORMAN, DE ;

BOVEY, FA ;

OTOCKA, EP .

MACROMOLECULES, 1972, 5 (05) :574-&

[8] OPTIMUM CONDITIONS FOR CRUDE-OIL AND PETROLEUM-PRODUCT ANALYSIS BY C-13 NUCLEAR MAGNETIC-RESONANCE SPECTROMETRY [J].

GILLET, S ;

DELPUECH, JJ ;

VALENTIN, P ;

ESCALIER, JC .

ANALYTICAL CHEMISTRY, 1980, 52 (06) :813-817

[9] CARBON-13 MAGNETIC RESONANCE .2. CHEMICAL SHIFT DATA FOR ALKANES [J].

GRANT, DM ;

PAUL, EG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1964, 86 (15) :2984-+

[10]

HAJAK M, 1978, ANAL CHEM, V50, P773