Using interfacial-sensitive sum-frequency generation (SFG) spectroscopy, it was found that incorporation of bulky and polar maleic anhydride (MA) into polystyrene (PSt) chains in an alternating manner, forming an alternating copolymer of P(St-alt-MA), led to reductions in π-π and dipolar interactions at the air interface relative to those in the bulk and thus greater Tg confinement effect for the alternating copolymer. The results demonstrate the crucial impacts of interfacial interactions on polymer dynamics under confinement.
- Zhexiao Xing
- Ningtao Zhu
- Biao Zuo
