Page 67 - Plastics Engineering
P. 67

50                                   Mechanical Behaviour of Plastics

                             12


                             10


                             8


                          z6
                          B
                          cn
                             4


                             2


                             0
                               0    0.5    1    1.5   2    2.5   3    3.5   4    4.5    5
                                                        Stmln (%)

                                         Fig. 2.7  Stress-strain  curves for polypropylene





























                                         Fig. 2.8  Stress-time  curves for polypropylene
   62   63   64   65   66   67   68   69   70   71   72