Observation of immobile regions in natural rubber at ambient temperature by solid-state 13C CP/MAS NMR spectroscopy

被引：9

作者：

Larsen, FH

Rasmussen, T

Pedersen, WB

Nielsen, NC

Jakobsen, HJ

机构：

[1] Aarhus Univ, Dept Chem, Instrument Ctr Solid State NMR Spect, DK-8000 Aarhus C, Denmark

[2] W Co A S, DK-8700 Horsens, Denmark

[3] Riso Natl Lab, Condensed Matter Phys & Chem Dept, DK-4000 Roskilde, Denmark

来源：

POLYMER | 1999年 / 40卷 / 25期

关键词：

natural rubber; immobile regions; solid-state C-13 CP/MAS NMR;

D O I：

10.1016/S0032-3861(99)00053-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Employing C-13 CP/MAS NMR spectroscopy, the existence of immobile regions in natural rubber (cis-1,4-polyisoprene) corresponding to a few percent of the monomer units has been detected at ambient temperature. For synthetic rubbers no immobile regions have been detected at all. Applying different physical and chemical treatments to natural rubber it is shown that mastication, gamma-irradiation, and increasing the temperature, slightly above the ambient, reduce the amount of immobile regions. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：7013 / 7017

页数：5

共 25 条

[1] SOLID-STATE C-13 NMR-STUDIES OF VULCANIZED ELASTOMERS .5. OBSERVATION OF NEW STRUCTURES IN SULFUR-VULCANIZED NATURAL-RUBBER [J].