**5.2 Preparation of natural fibers**

238 Some Critical Issues for Injection Molding

*<sup>c</sup> <sup>f</sup>*

[ ]( ) (1 )


*f p*

With calculating A factor from DMAT data, one can interpret the interaction in the interphase, where there is strong interaction between wood fiber and polymer matrix due to reduction of macromolecular mobility in the vicinity of the filler surface, A factor decreases. In other words, a low value of A factor is an indication of good adhesion or high degree of interaction between two phases. This factor presents a macroscopic quantitative measure of

Polypropylene of Arak Petrochemical Company in Iran (Trade Name of V30S) with a density of 0.9 g/cm3, and the melt flow index (MFI) of 16 g/10 min was used in this study as matrix. 60-mesh virgin wood flour was used as filler. The characteristics of the natural fibres

*i i f p*

*Tan <sup>A</sup>*

 

(1 )

*Tan <sup>A</sup>*

*Tan <sup>A</sup>*

Where Equation (3) can be rewritten as:

interfacial adhesion during dynamic loading.

Fig. 15. Characteristics of the wood flour.

**5. Experimental** 

are shown in Fig. 15.

**5.1 Materials** 

*p*

(1 )(1 )

*c*

*Tan* (2)

*Tan* (3)

*Tan* (4)
