摘要
通过熔融共混将β成核剂WBG-Ⅱ和烷基化氧化石墨烯(GO-ODA)混入等规聚丙烯(iPP)中,研究了GO-ODA对WBG-Ⅱ自组装行为的影响。结果表明:GO-ODA的加入会影响WBG-Ⅱ自组装形态,GO-ODA可以通过氢键相互作用为组装过程中的成核剂提供额外成核位点。另外,在iPP非等温结晶过程中,WBG-Ⅱ和GO-ODA对复合材料的起始结晶温度(T_(c)^(on))和结晶峰温度(T_(c)^(max))表现出协同效应,而不是叠加效应。当最终加热温度(T_(f))低于220℃时,复合材料的T_(c)^(on)和T_(c)^(max)对GO-ODA含量不敏感,成核剂的形态变化较小。当T_(f)高于240℃时,随着GO-ODA添加量的增加,T_(c)^(on)和T_(c)^(max)先降低到最小值,当GO-ODA质量分数超过0.20%时又升高。
βnucleating agent WBG-Ⅱ and alkylated graphene oxide(GO-ODA)were mixed into isotactic polypropylene(iPP)by melt blending.The effect of GO-ODA on self-assembly behavior of WBG-Ⅱ was studied.The results show that the addition of GO-ODA can affect the self-assembly morphology of WBG-Ⅱ.Additional nucleation sites can be provided by GO-ODA during the assembly process through hydrogen bond interactions.In addition,in the non-isothermal crystallization process of iPP,WBG-Ⅱ and GO-ODA have a synergistic effect on the initial crystallization temperature(T_(c)^(on))and the crystallization peak temperature(T_(c)^(max))of the composite,rather than a superimposed effect.When the final heating temperature(T_(f))is lower than 220℃,T_(c)^(on) and T_(c)^(max) are not sensitive to the content of GO-ODA,and the morphology of the nucleating agent changes little.When T_(f) is higher than 240℃,T_(c)^(on) and T_(c)^(max) first decrease to the minimum with the increase of GO-ODA addition,and then increase when the mass fraction of GO-ODA exceeds 0.20%.
作者
何满
常宝宝
曹伟
He Man;Chang Baobao;Cao Wei(National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, Henan, 450000)
出处
《现代塑料加工应用》
CAS
2021年第5期5-9,共5页
Modern Plastics Processing and Applications
基金
国家自然科学基金项目(52003249,U1604253)。
关键词
等规聚丙烯
稀土成核剂
氧化石墨烯
自组装
非等温结晶
isotactic polypropylene
rare earth nucleating agent
graphene oxide
self-assembly
non-isothermal crystallization
