Structure and Composition of the Earth. The solid earth can be divided into:
from the earth - into the earth
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from the earth - into the earth PHB (Polyhydroxybutyrate) Urs J. Hänggi, Biomer Eindhoven 2008
description
from the earth - into the earth. PHB (Polyhydroxybutyrate) Urs J. Hänggi, Biomer. Eindhoven 2008. PHB serves biological needs, not plastics despite of this: - absolutely linear -> low melt viscosity -> thin walls - absolutely isotactic -> extremely crystalline -> creep resistant - PowerPoint PPT Presentation
Transcript of from the earth - into the earth
from the earth - into the earth
PHB (Polyhydroxybutyrate)
Urs J. Hänggi, Biomer
Eindhoven 2008
from the earth - into the earth
PHB serves biological needs, not plasticsdespite of this:
- absolutely linear -> low melt viscosity -> thin walls- absolutely isotactic -> extremely crystalline -> creep resistant- absolutely no nucleants -> control of spherulite size- not thrombogenic or immunogenic
Eindhoven 2008
from the earth - into the earth
Compounding PHB
- mixture of nucleants -> tough- mixture of low and high mw plasticizers -> ductile- other processing aids -> stabilize melt -> Like soft PVC, PP, or PE-HD
Eindhoven 2008
from the earth - into the earth
Example clips
- sharp edges (letters BIOMER)- glossy surface (background of BIOMER)- soft, pleasant touch
Eindhoven 2008
from the earth - into the earth
Example fireworks
- heat resistance- density (sinks in lakes)- fully biodegradable on land and on bottom of lakes
Eindhoven 2008
from the earth - into the earth
Example smoke grenades
- thin and thick parts in same shot- shock resistance (creep resistance)- resistance to chemicals- shelf live 5 years (-40 to +60°C)- fully biodegradable- ruminants are not harmed (produce milk!)
Eindhoven 2008
from the earth - into the earth
Example ELISA sticks
- surface properties (balance between hydrophilic and hydrophobic)- not thrombogenic, not immunogenic ->ideal for medical devices
Eindhoven 2008
from the earth - into the earth
Example film hindge
- Stretching crystalls -> last forever
Eindhoven 2008
from the earth - into the earth
Summary compounded PHB (selection)
- like PP or PE-HD plus- of renewable resources- biodegradable in aerobic (garden, compost) as well as in anaerobic environments (sewage tanks, bottom of lakes, sea)- adjustable melt viscosity- creep resistant- thin walls, complex structures, sharp edges (LCP type behavior)- shiny surfaces, agreeable touch- medical devices
Eindhoven 2008
