With the development of polymer science and technology, people started using polymer as a material in various applications, both where other material cannot be used and as replacements for the conventional materials e.g. metals, ceramics, wood etc. Plastics are the class of polymers, characterized by high strength and load bearing capacity. Hence they are widely used in structural engineering applications.However, the poor fracture resistance of many commercial plastics restricts their use for such applications.Unlike the modification of thermoplastics, which often requires only the simple...