Suppression of the Self-Nucleation Effect of Semicrystalline Polymers by Confinement

被引：20

作者：

Wang, Ming ^{[1
,2
]}

Li, Jing ^{[1
]}

Shi, Guangyu ^{[1
]}

Liu, Guoming ^{[1
,2
]}

Muller, Alejandro J. ^{[3
,4
,5
]}

Wang, Dujin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem,CAS Key Lab Engn Plast, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Basque Country, UPV EHU, POLYMAT, Fac Chem, Donostia San Sebastian 20018, Spain

[4] Univ Basque Country, UPV EHU, Fac Chem, Dept Polymers & Adv Mat Phys Chem & Technol, Donostia San Sebastian 20018, Spain

[5] Basque Fdn Sci, Ikerbasque, Bilbao 48013, Spain

来源：

MACROMOLECULES | 2021年 / 54卷 / 08期

基金：

国家重点研发计划; 中国国家自然科学基金; 欧盟地平线“2020”;

关键词：

SYNDIOTACTIC POLYPROPYLENE; ISOTACTIC POLYPROPYLENE; TRIBLOCK COPOLYMERS; CRYSTALLIZATION; CRYSTALS; POLYETHYLENE; BEHAVIOR; BLOCKS; SINGLE; MELTS;

D O I：

10.1021/acs.macromol.1c00485

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The melt memory effect is well-known in polymer crystallization. It is caused by self-nuclei that persist above the melting temperature. The origin and physical nature of self-nuclei are still under debate. In this work, we studied the effect of confinement on the self-nucleation (SN) behavior of two typical semicrystalline polymers, poly(e-caprolactone) (PCL) and poly(butylene succinate) (PBS), using anodic aluminum oxide (AAO) templates. The density of AAO nanopores covers a range of 10(11)-10(13) cm(-3). Narrowing of the SN region (Domain II) with a decrease of the AAO diameter was observed for both infiltrated PCL and PBS, indicating the suppression of the SN effect. When the diameter of AAO is below 60 nm, Domain II vanished. Further analysis indicated that Domain IIa (melt memory region) vanished first, followed by Domain IIb (self-seeding region). The results provide a method for estimating the self-nuclei density of different polymers at different temperatures.

引用

页码：3810 / 3821

页数：12

共 51 条

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