Premium
The Synergistic Effect of Rare‐Earth Complex Nucleating Agent and Graphene Oxide on the Non‐Isothermal Crystallization Behavior of iPP Originating From the Diverse Self‐Assembly Morphology
Author(s) -
He Man,
Shi Honghui,
Chang Baobao,
Zheng Guoqiang,
Cao Wei,
Liu Chuntai,
Shen Changyu
Publication year - 2021
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.202000357
Subject(s) - crystallization , nucleation , materials science , oxide , morphology (biology) , isothermal process , tacticity , graphene , chemical engineering , supercooling , polymer chemistry , crystallography , chemistry , composite material , thermodynamics , nanotechnology , organic chemistry , polymer , metallurgy , polymerization , engineering , physics , genetics , biology
Abstract Rare‐earth nucleating agent (WBG‐II) is a kind of additive for isotactic polypropylene (iPP), which will dissolve into iPP melt during heating and re‐aggregate into diverse morphologies during cooling through self‐assembly. However, up to now, little work about the influence of graphene oxide (GO) on the self‐assembly of WBG‐II can be found. Results in this study suggest that via the hydrogen‐bond interaction, GO can provide additional nuclei for WBG‐II during self‐assembly. Consequently, during non‐isothermal crystallization, WBG‐II and GO present a synergistic effect rather than a superposition effect on the crystallization onset temperature ( T c‐on ), the crystallization peak temperature ( T c‐peak ), the crystallization half time ( t 1/2 ), and the relative content of β‐iPP ( K β ), especially when the final heating temperature ( T f ) is higher than 240 °C. Specifically, as T f is lower than 220 °C, T c‐on , T c‐peak , t 1/2 , and K β are insensitive to the weight concentration of GO‐ODA (ϕ G ), since that little WBG‐II is dissolved into iPP melt and the morphology of WBG‐II is changed only very slightly; as T f is higher than 240 °C, T c‐on , T c‐peak , and K β first decrease to a minimum value with increasing of ϕ G , and then increase when ϕ G exceeded 0.2%.