

FOLLOWUS
Tianjin Key Laboratory of Composite and Functional Materials, and School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
magq@tju.edu.cn (G.Q.M.)
zhe.ma@tju.edu.cn (Z.M.)
Received:05 April 2023,
Revised:2023-5-15,
Accepted:28 May 2023,
Online First:07 August 2023,
Published:01 December 2023
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Zhang, D.; Zhao, R. J.; Ma, G. Q.; Ma, Z. Self-nucleation effect of crystallization with various nucleating agents. Chinese J. Polym. Sci. 2023, 41, 1912–1920
Dai Zhang, Rui-Jun Zhao, Gui-Qiu Ma, et al. Self-nucleation Effect of Crystallization with Various Nucleating Agents[J]. Chinese Journal of Polymer Science, 2023, 41(12): 1912-1920.
Zhang, D.; Zhao, R. J.; Ma, G. Q.; Ma, Z. Self-nucleation effect of crystallization with various nucleating agents. Chinese J. Polym. Sci. 2023, 41, 1912–1920 DOI: 10.1007/s10118-023-3014-3.
Dai Zhang, Rui-Jun Zhao, Gui-Qiu Ma, et al. Self-nucleation Effect of Crystallization with Various Nucleating Agents[J]. Chinese Journal of Polymer Science, 2023, 41(12): 1912-1920. DOI: 10.1007/s10118-023-3014-3.
This work found that α-nucleating agent talc and β-nucleating agent TMB-5 can accelerate the non-isothermal crystallization of polypropylene and change the temperature range of self-nucleation Domain II. In presence of TMB-5
the self-nucleation effect enhanced the formation of α-crystallite.
In this work
the self-nucleation effect on crystallization was studied for polypropylene with various nucleating agents. The talc was employed to accelerate crystallization of monoclinic
α
-crystallites
while
N
N
′-dicyclohexyl-2
6-naphthalenedicarboxamide TMB-5 was used to accelerate the crystallization kinetics and also induce formation of trigonal
β
-crystallites. To induce self-nucleation effect
the occurrence criterion was assessed by the transition temperatures from various domains and the available temperature width. More importantly
the resulting influences of self-nucleation effect were quantified by the change of crystallization kinetics and the potential polymorphism variation. It was found that the
α
-nucleating agents of talc broadened the temperature window for inducing Domain II by elevating the transition temperature from Domain I to Domain II. Although
β
-nucleating agent (
β
-NA) of
N
N
′-dicyclohexyl-2
6-naphthalenedicarboxamide TMB-5 elevated cooling crystallization temperature obviously
the temperature window for Domain II was narrowed. It should be emphasized that in presence of
β
-NA TMB-5
the self-nucleation effect enhances the crystallization of
α
-crystallite
which show the competition with
β
-NA TMB-5. At last
the ternary PP/talc/TMB-5 blend was prepared with the same amounts of
α
-NA talc and
β
-NA TMB-5 and it exhibits a similar self-nucleation effect of crystallization
indicating the dominant role of
β
-NA TMB-5.
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