"chalking" - 1 õppematerjal

ABS Piping Australian Presentation

transition from ductile to brittle failure in a PE pipe For very long periods the failure can occur at lower stress levels than would be predicted for shorter periods Plastic Pipe Failures Water Absorption Universal solvent reacts Destroys adhesive bonds with the backbone chain Chalking or Decreases tensile pigmentation or strength and stiffness reinforcement Increases creep strain Photochemical promotes Hydrolysis reactions are free radical reactions slow Lower glass transition Processing stabilisers temperature remove moisture if used Reduces electrical resistance Regrind & Water Adsorption Regrind Water Adsorption