| 摘要 |
The invention relates to a styrene block copolymer and an unsaturated cyclic anhydride, such as maleic anhydride, a process for producing the copolymer by means of controlled polymerisation with free radicals, in which certain parameters are adjusted in order to control the microstructure and the molecular weight of the copolymer, and a method of using the block copolymer, including the use thereof as a compatibility agent. The microstructure and the molecular weight of the block copolymer can be controlled by adjusting the initiator to monomer ratio and/or by adjusting the stable free radical to initiator ratio. Said copolymer, which can be produced in a single-step process, comprises a controlled microstructure which enables one block to be reactive towards various chemical groups available in the engineering polymers and the other block to be completely miscible with polystyrene or miscible with polymers that are miscible with polystyrene, such as polyphenylene ether. <IMAGE> <IMAGE>
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