Bonding of Non-polar Plastics

If attempts are made to bond non-polar plastics such as PE, polypropylene (PP), fluoroplastics, and thermoplastic polyolefins (TPO), very weak assemblies are usually obtained with tensile shear strengths of 0.7 MPa. These readily fail under slight impact or exposure to moisture. 

There are several methods that have been used to improve the 

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