相关链接
联系方式
  • 通信地址:黑龙江省哈尔滨市香坊区林园路4号
  • 邮编:150040
  • 电话:******
  • 传真:
  • Email:gywen@hrbust.edu.cn
当前位置:> 首页 > 论文著作 > 正文
18.【Langmuir】Aggregation Behavior of the Blends of Homo-PS and PS-b-PEO-b-PS at the Air/Water Interface
作者:Xu, Wei ; Wen, Gangyao*; Wu, Tao; Chen, Nanyang
关键字:LB film; block copolymer; polymer blend; PS-b-PEO-b-PS; homo-PS
论文来源:期刊
具体来源:Langmuir, 2019, 35(41), 13435-13441.
发表时间:2019年

Aggregation behaviors of the blended Langmuir monolayers of a homopolymer polystyrene (h-PS) and a triblock copolymer polystyrene-b-poly(ethylene oxide)-b-polystyrene (PS-b-PEO-b-PS) were studied by the Langmuir film balance technique, and the morphologies of their Langmuir-Blodgett (LB) films were studied by atomic force microscopy. The isotherms of the h-PS/PS-b-PEO-b-PS blends shift to small areas with the increase of h-PS content, and a pseudo-plateau appears as h-PS content is below 60 wt %. It is worth noting that the blended isotherms appear at the left of their corresponding ideal ones, which means that the blended monolayers are a little more condensed due to attractive interaction between the two components. Hysteresis phenomena exist in all of the blended monolayers, and the higher the PS-b-PEO-b-PS content, the larger the hysteresis degree is because of the stronger looped-PEO entanglements. All the blended LB films of h-PS and PS-b-PEO-b-PS prepared under low pressure exhibit the mixed structures of small and large isolated circular aggregates. The small aggregates are the copolymer micelle cores and the large ones are attributed to coalescence of the local h-PS chains and some PS blocks. Upon further compression, the aggregates in the blended LB films become a little denser as h-PS content is below 60 wt %, whereas those become totally close-packed with decreased size as h-PS content is 80 wt %.

Article address: https://pubs.acs.org/doi/10.1021/acs.langmuir.9b02388

Request link: https://pubs.acs.org/articlesonrequest/AOR-JhE8W7qGYjvqUg88aY2C