Comparative study of the tribological properties of polyamide 6 filled with molybdenum disulfide and liquid crystalline additives

被引：25

作者：

Bermúdez, MD ^{[1
]}

Carrión-Vilches, FJ ^{[1
]}

Martínez-Mateo, I ^{[1
]}

Martínez-Nicolás, G ^{[1
]}

机构：

[1] Univ Politecn Cartagena, Dept Ingn Mat & Fabricac, Grp Ciencia Mat & Ingn Met, Cartagena 30202, Spain

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2001年 / 81卷 / 10期

关键词：

nylon (PA 6); sliding friction and wear; MoS2; liquid crystal-polymer blends;

D O I：

10.1002/app.1683

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 effect of adding a 1 wt % proportion of thermotropic liquid crystals 4,4 ' -dibutylazobenzene (LC1) and 4-octyl, 4 ' -cyanobiphenyl (LC2) on the tribological properties of polyamide 6 (PA 6) is compared with that of the addition of MoS2 in different concentrations (1 and 5 wt %). Friction and wear are determined in a pin-on-disk tribometer by using injection-molded additivated nylon disks against steel or aluminum pins, below (25 degreesC) and above (80 degreesC) glass transition temperature. Polymeric blends are characterized by differential scanning calorimetry and by optical and scanning electron microscopy and microanalysis. Concentration of liquid crystalline additives is higher at the surface than in the bulk of PA 6 disks. Crystallinity degree of PA-6 is not significantly changed by the presence of additives. Addition of 1 wt % LC1 improves processibility of PA 6 by increasing its melt flow rate. Cyanoderivative liquid crystal (LC2) shows the best wear-reducing ability for PA 6/steel contacts at all temperatures. (C) 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2426-2432, 2001.

引用

页码：2426 / 2432

页数：7

共 26 条

[1]

[Anonymous], PLASTICS ADDITIVES

[2]

[Anonymous], 1990, ANN BOOK ASTM STAND

[3]

[Anonymous], 1997, Handbook of Liquid Crystal Research

[4]

[Anonymous], 1996, ENG TRIBOLOGY

[5] Supercritical carbon dioxide extraction of liquid crystalline azobenzenes [J].

Barrado, I ;

Meseguer, V ;

Bermudez, MD ;

MartinezNicolas, G .

JOURNAL OF SUPERCRITICAL FLUIDS, 1997, 11 (1-2) :73-80

[6]

Bayer R.G., 1994, Mechanical Wear Prediction and Prevention

[7] Tribological properties of liquid crystals as lubricant additives [J].

Bermudez, MD ;

Martinez-Nicolas, G ;

Carrion-Vilches, FJ .

WEAR, 1997, 212 (02) :188-194

[8]

Bermúdez MD, 1999, J APPL POLYM SCI, V74, P831, DOI 10.1002/(SICI)1097-4628(19991024)74:4<831::AID-APP9>3.3.CO

[9]

2-5

[10]

Bershtein V.A., 1994, DIFFERENTIAL SCANNIN

← 1 2 3 →