22.07.2013 Views

THE ROLE OF THE

THE ROLE OF THE

THE ROLE OF THE

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

186 The Role of the Chemist in Automotive Design<br />

Ozone Conversion %<br />

100<br />

80<br />

60<br />

40<br />

20<br />

12.9 bIomaterIals<br />

50% @ 150,000 miles/62% @ 0 miles; DF = 50/62 = .81<br />

20% @ 150, 000 miles/64% @ 0 miles; DF = 20/64 = .31<br />

0<br />

0 50,0000 100,000 150,000 200,000<br />

Mileage<br />

FIgure 12.4 Deactivation factors calculation chart.<br />

Another opportunity for the automotive chemist to improve the environmental<br />

imperative is to utilize bio-based materials as building blocks. An outstanding<br />

example is the manufacture of nylon 6-10 from castor oil. The BASF Corporation<br />

has plans to utilize the product as an alternative to nylon 6. The castor oil is<br />

treated with caustic soda and heat to render the sebacic acid portion of the polymer<br />

(Equation 12.2).<br />

The sebacic acid is then polymerized with hexamethlyene diamine as with traditional<br />

nylons. Figure 12.5 shows the structure of this polymer. Up to 63% of the<br />

material can be derived from castor oil. Table 12.8 shows some important properties<br />

as compared to nylon 6. The main properties of tensile strength and modulus, at least<br />

in a dry state, are fairly similar. Again, we see how the automotive chemist’s input<br />

can be utilized in vehicle design and development.<br />

R<br />

H<br />

N<br />

FIgure 12.5 Structure of nylon 6-10.<br />

N<br />

O<br />

H O<br />

n<br />

R

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!