Sentence:  Chapter 4 relates photomicrographs of thermoplastics/thermoplastics, thermoplastics/thermosets, and some selected thermoplastic vulcanizates in which the phase morphology is not particularly <WSD>cocontinuous</WSD>. 
Meaning of the word marked with <WSD> tags:  Blending two linear, amorphous polymers such that the phases interpenetrate.