Description and modeling of polyurethane hydrolysis used as thermal insulation in oil offshore conditions

被引：70

作者：

Le Gac, P. Y. ^{[1
]}

Choqueuse, D. ^{[1
]}

Melot, D. ^{[2
]}

机构：

[1] IFREMER, Ctr Brest, Marine Struct Lab, F-29280 Plouzane, France

[2] Total SA, DGEP DEV TEC COR 22D67, F-92078 Paris 6, France

来源：

POLYMER TESTING | 2013年 / 32卷 / 08期

关键词：

Polyurethane; Hydrolysis; Accelerated ageing; Sea water; Coating; Offshore; WATER-UPTAKE; AGING CONDITIONS; SYNTACTIC FOAMS; DEGRADATION; STABILITY; ELASTOMERS; URETHANES;

D O I：

10.1016/j.polymertesting.2013.10.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Polymers are widely used for passive thermal insulation coatings on steel pipe in offshore oil and gas production. In this industry, structures used in deep sea have to be reliable, as they are in service for more than 20 years in a very severe environment: sea water, hydrostatic pressure and temperature gradient. One of the main questions is how to test and predict the lifetime of such structures in the laboratory? This study presents one approach that has been developed to characterize and predict the degradation of polymers used as thermal insulation materials. This paper is dedicated to polyurethane (polyether based) degradation in sea water at high temperature. Ageing has been performed in natural sea water under hydrostatic pressure at temperatures ranging from 70 to 120 degrees C on 2 mm thick samples. Water diffusion in the material and hydrolysis have been characterized using mass evolution and tensile tests. Based on these results, a model for the urethane hydrolysis reaction is proposed. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1588 / 1593

页数：6

共 31 条

[1] On the use of Arrhenius law in the domain of polymer ageing [J].

Audouin, L. ;

Colin, X. ;

Fayolle, B. ;

Verdu, J. .

MATERIAUX & TECHNIQUES, 2007, 95 (03) :167-177

[2] THE DEGRADATION OF POLYURETHANE [J].

BARENDREGT, RB ;

VANDENBERG, PJ .

THERMOCHIMICA ACTA, 1980, 38 (02) :181-195

[3] LIFETIME PREDICTION IN THE HYDROLYTIC AGING OF POLYESTERS [J].

BELLENGER, V ;

GANEM, M ;

MORTAIGNE, B ;

VERDU, J .

POLYMER DEGRADATION AND STABILITY, 1995, 49 (01) :91-97

[4] Correlation of chemical and mechanical property changes during oxidative degradation of neoprene [J].

Celina, M ;

Wise, J ;

Ottesen, DK ;

Gillen, KT ;

Clough, RL .

POLYMER DEGRADATION AND STABILITY, 2000, 68 (02) :171-184

[5] MODELS FOR POLYURETHANE HYDROLYSIS UNDER MODERATELY ACIDIC CONDITIONS - A COMPARATIVE-STUDY OF HYDROLYSIS RATES OF URETHANES, UREAS, AND AMIDES [J].

CHAPMAN, TM .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1989, 27 (06) :1993-2005

[6] Molecular weight distribution and mass changes during polyamide hydrolysis [J].

Chaupart, N ;

Serpe, G ;

Verdu, J .

POLYMER, 1998, 39 (6-7) :1375-1380

[7]

Crawford V.A., 1988, ENG CTR FORT BELVOIR

[8] Accelerated ageing of polyurethanes for marine applications [J].

Davies, Peter ;

Evrard, Guy .

POLYMER DEGRADATION AND STABILITY, 2007, 92 (08) :1455-1464

[9] Evidencing antagonist effects of water uptake and leaching processes in marine organic coatings by gravimetry and EIS [J].

Fredj, N. ;

Cohendoz, S. ;

Mallarino, S. ;

Feaugas, X. ;

Touzain, S. .

PROGRESS IN ORGANIC COATINGS, 2010, 67 (03) :287-295

[10]

GILLEN, 1997, EXTRAPOLATION ACCELE, V5

← 1 2 3 4 →