Sentence:  Sequential living polymerizations of hydrophilic and hydrophobic vinyl ethers from these trifunctional initiators give <WSD>amphiphilic</WSD> triarmed block copolymers where the hydrophilic segments may be placed either inner or outer layer of the three arms. 
Meaning of the word marked with <WSD> tags:  Being a detergent: having both hydrophilic and hydrophobic (or lipophilic) groups.