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ACCELERATED LASER AGEING OF PLASTICS

Objective



DURING THEIR LIFETIMES PLASTICS ARE SUBJECT TO AGEING BY A NUMBER OF NATURAL FORCES. ULTRAVIOLET (UV) LIGHT IS ONE OF THE MOST POTENT NATURAL FORCES. LEADING INITIALLY TO MOLECULAR BOND CLEAVAGE AND ULTIMATELY TO COMPLETE POLYMER DEGRADATION. EXPECTED PRODUCT LIFETIMES ARE OFTEN > 15 YEARS, MAKING THE GENERATION OF RELIABLE, ACCELERATED AGEING DATA OF CRUCIAL IMPORTANCE.

HOWEVER, RAPIDLY CHANGING CUSTOMER EXPECTATIONS AND NEW POLYMER DEVELOPMENTS MEAN THAT AVAILABLE TESTING TIMES ARE CONSTANTLY BEING CONSTRAINED. CONVENTIONAL TEST METHODS PROVIDE AT MOST, ONLY A HUNDREDFOLD (X 10 TO THE POWER 2) ACCELERATION OVER NATURAL AGEING. THEREFORE, THERE IS A NEED FOR NEW, RELIABLE TEST METHODS WITH GREATLY INCREASED RATES OF ACCELERATION. THE PROPOSED NEW TEST METHOD USES A POWERFUL, PULSED LASER AS THE UV LIGHT SOURCE AND PROMISES THE FOLLOWING BENEFITS:
- A SIGNIFICANT SHORTENING OF QUALIFICATION TIMES
- A FASTER IMPLEMENTATION OF NEW POLYMER SYSTEMS
- A SAFER PREDICTION OF LONG TERM MATERIAL BEHAVIOUR AND THEREFORE A REDUCED RISK OF FIELD FAILURES.

THEREFORE THE MAIN OBJECTIVES ARE:
- EVALUATION OF A NEW AGEING METHOD FOR POLYMERS
- PREDICTION OF POSSIBLE ACCELERATION FACTORS
- COMPARISON WITH ARTIFICIAL AND NATURAL AGEING.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

STANDARD ELEKTRIK LORENZ AG
Address
Lorenzstrasse, 10
70435 Stuttgart
Germany

Participants (6)

CENTRO RICERCHE FIAT S.C.P.A
Italy
Address
50,Strada Torino, 50
10043 Orbassano
Daimler-Benz AG
Germany
Address
Epplestraße 225
70567 Stuttgart
GIE PSA Peugeot Citroen
France
Address
Avenue De La Grande Armee 75
75116 Paris
REGIENOV GROUPEMENT D INTERET ECONOMIQUE*
France
Address
9-11,Quai Alphonse Le Gallo 13
92100 Boulogne-billancourt
Rover Group plc
United Kingdom
Address
Gaydon Test Centre Banbury Road Lighthorne
CV35 0BL Warwick
VOLKSWAGEN AG
Germany
Address
Berliner Ring 2
Wolfsburg