Raw Material - Polybutene-1

Typical Properties

The following table illustrates the physical, mechanical and thermal properties of Polybutene-1. The values shown are typical mid-range figures and should not be considered as a specification - in fact, several different grades of Polybutene-1 are produced with properties tailored to satisfy different applicational requirements.
Material PropertiesMethodUnitPB 4237 Grey
Physical Properties
Melt flow rate MRF 190°C/2.16 kg ISO 1133 dg/min 0.4
Density ISO 1183 g/cm3 0.94
Hardness Shore D ISO 868 - 60
Mechanical Properties
Tensile strength at yield ISO R 527 MPa 20
Tensile strength at break ISO R 527 MPa 35
Elongation at break ISO R 527 % 300
Flexural Elastic Modulus ISO 178 MPa 450
Notched Impact Strength at 20°C ISO 180 kJ/m2 20
Notched Impact Strength at 0°C ISO 180 kJ/m2 7
Thermal Properties
Melting point range DSC (a) °C 127 - 129
Vicat Softening Temperature ISO 306 °C 120
Coefficient of linear thermal expansion ASTM D696 mm/m.K 0.13
Thermal conductivity (30-70°C) ASTM E1530 W/m.K 0.19
Glass transition temperature DMTA (b) °C -16
Specific Characteristics(c)
Environmental Stress Cracking (at 50°C in 10% aqueous solution of lgepal) ASTM D-1693 h 15,000 no failure
Wet abrasion (sand slurry test, 23°C, 100h)   % 1

(a) Differential Scanning Calorimetry
(b) Dynamic Mechanical Thermal Analysis
(c) Measured on natural PB homopolymer
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