Semi-structural pressure sensitive

The section on chemistry of adhesives evolves from rubber-based adhesives to semi- structural and finally to structural adhesives. Everaerts and Clemens provide a thorough description of chemistry and applications of pressure sensitive adhesives and Kinning and Schneider describe an enabling technology for pressure... 

Selected examples have been cited to demonstrate that areas of acrylic, anaerobic and radiation-curable adhesive developments have begun to consider telechelic polybutadiene/acrylonitrile liquids as useful formulating ingredients either in direct admixture or in the preparation of rubber-modified oligomers serving as an adhesive formulating base. These cited adhesive examples cover structural, semi-structural, gap-filling and pressure-sensitive types. 

Due to its specialty in molecular chain structure, i.e., a semi-rigid-chain, the viscosity of PES is not very sensitive to changes in temperature or shear rate. Hence the flow performance cannot be increased effectively by shear rate or increases in barrel temperature and injection pressure. Since the SFL of PES is relatively low, it is difficult to mold parts with st histicated and thin-wall structures. 

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