Comparing Crystallization Kinetics between Polyamide 6 and Polyketone via Chip-Calorimeter Measurement

被引：23

作者：

He, Yucheng ^{[1
]}

Luo, Ruiqi ^{[1
]}

Li, Zhaolei ^{[1
,2
]}

Lv, Ruihua ^{[1
]}

Zhou, Dongshan ^{[1
]}

Lim, Soonho ^{[3
]}

Ren, Xiaoning ^{[4
]}

Gao, Hongxu ^{[4
]}

Hu, Wenbing ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Coordinate Chem, Nanjing 210023, Jiangsu, Peoples R China

[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Peoples R China

[3] KIST, Carbon Convergence Mat Res Ctr, Jeonbuk Inst Adv Composite Mat, Jeonbuk 565902, South Korea

[4] Xian Modern Chem Res Inst, Sci & Technol Combust & Explos Lab, Xian 710065, Shaanxi, Peoples R China

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2018年 / 219卷 / 03期

基金：

中国国家自然科学基金;

关键词：

crystallization; DSC; polyamides; polyketone; MELTING BEHAVIOR; TOPOLOGICAL CONSTRAINTS; CRYSTAL STRUCTURE; POLYMERS; DIFFRACTION;

D O I：

10.1002/macp.201700385

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polyamide 6 and aliphatic polyketone exhibit similar melting points and heats of fusion, which expose the kinetic effects of intermolecular interactions on their crystallization kinetics. The commercial chip-calorimeter Flash DSC1 is employed to measure their crystallization rates in a broad temperature range. The results show that polyamide crystallizes faster than polyketone at high temperatures, but slower at low temperatures. The faster crystallization is attributed to a lower lateral-surface free energy for crystal nucleation at high temperatures on account of the sheet-like hydrogen bonding in polyamide crystals. The slower crystallization is attributed to the lower molecular mobility for crystal nucleation at low temperatures on account of the higher glass transition temperature of polyamide.

引用

页数：6

共 36 条

[1] Influence of structural and topological constraints on the crystallization and melting behavior of polymers. 1. Ethylene/1-octene copolymers [J].