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Combination of glass fibres and minerals in polyamides
Author(s) -
Hewel M.,
Sun F.
Publication year - 1991
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19910500115
Subject(s) - materials science , polyamide , composite material , shrinkage , young's modulus , ultimate tensile strength , anisotropy , isotropy , glass fiber , elasticity (physics) , izod impact strength test , modulus , elastic modulus , optics , physics
Abstract Polyamides reinforced with glass fibres are characterised by high values for modulus of elasticity and notched impact strength but also have the negative properties of rough surfaces and anisotropy ‐ particularly anisotropic shrinkage. Mineral‐filled polyamides have good surface properties, are isotropic and have high impact strength, however, the elasticity modulus is only slightly better than for normal polyamides and notched impact strength values are relatively low. Through a combination of glass fibres and mineral filler, surface properties can be improved and anisotropy reduced. In order to achieve the optimum mechanical properties a range of 0 ‐ 50 wt.‐% glass fibre content and 0 ‐ 40 wt.‐% mineral content was systematically examined using statistically designed experiments. This investigation showed the relationship between the “Responses”, surface appearance, shrinkage, modulus of elasticity, impact strength and tensile properties and the “variables”, glass fibre and mineral content. Optimal products, based on the model functions, can be chosen in this way.