Studies on the Crystallization and Properties of PA6/Potassium Chloride Composites

Xiao-ying Hu; Qiang Zheng; Cai-hong Wang; Jun Wang; Jie Yu; Sheng-jun Lu

doi:10.11777/j.issn1000-3304.2016.15321

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Studies on the Crystallization and Properties of PA6/Potassium Chloride Composites

Research Article | 更新时间：2021-03-19

- Studies on the Crystallization and Properties of PA6/Potassium Chloride Composites
- Acta Polymerica Sinica Issue 6, Pages: 814-821(2016)
- 作者机构：
  
  1.贵州大学材料与冶金学院贵阳 550025
  2.国家复合改性聚合物材料工程技术研究中心贵阳 550014
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2016.15321
  CLC：
- Published：2016-6，
  
  Received：26 November 2015，
  
  Revised：12 January 2016，
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Xiao-ying Hu, Qiang Zheng, Cai-hong Wang, Jun Wang, Jie Yu, Sheng-jun Lu. Studies on the Crystallization and Properties of PA6/Potassium Chloride Composites. [J]. Acta Polymerica Sinica (6):814-821(2016)
DOI：

Xiao-ying Hu, Qiang Zheng, Cai-hong Wang, Jun Wang, Jie Yu, Sheng-jun Lu. Studies on the Crystallization and Properties of PA6/Potassium Chloride Composites. [J]. Acta Polymerica Sinica (6):814-821(2016) DOI： 10.11777/j.issn1000-3304.2016.15321.

摘要

通过熔融共混法制备了不同KCl含量下的尼龙6(PA6)/KCl复合材料

采用示差扫描量热仪(DSC)、流变仪、红外光谱(IR)、电子拉伸机等研究了KCl含量对PA6/KCl复合材料结晶行为、流变性能及力学性能的影响

并研究了其受限机制.力学性能研究结果表明

随着KCl含量的增加

PA6/KCl复合材料拉伸强度和冲击强度呈现出先增大后减小的趋势

在KCl含量为3 phr时

复合材料拉伸强度和冲击强度分别达到最大值82.67 MPa和7.34 kJ/m

较纯PA6分别增加了10.8%和34.68%

动态力学性能测量结果表明

在测量温度范围内

复合材料的储能模量均高于纯PA6

在25℃体系储能模量(

')随KCl含量的增加而增大

复合体系抵抗弯曲变形能力增加

而结晶行为研究结果表明

增加KCl的含量

PA6/KCl复合材料的成核温度、晶体生长温度、熔融温度及玻璃化转变温度均向低温方向移动

成核密度和成核速率也逐渐减小

结晶能力下降

结晶度减小

结晶度由原来25.30%变为19.34%

而结晶诱导时间逐渐增加.流变性能研究结果表明

随着KCl含量的增加

复合体系的零剪切黏度逐渐增加

且所有的体系均呈现出假塑性流体行为

剪切变稀现象越来越明显

特征松弛时间

、

和

逐渐增加

复合体系的松弛机制发生变化.

Abstract

The polyamide 6(PA6)/KCl composites were prepared by the melt blending method.The effect of KCl content on the crystallization behavior

as well as the rheological and mechanical properties of the composities was studied by differential scanning calorimeter (DSC)

advanced rheometer (ARES-G2)

Fourier fransform infrared spectrometer (IR) and universal testing machine.The mechanism of confined crystallization was also systematically investigated.The mechanical property results show that the tensile strength and notch impact strength increased first and decreased finally with the increase of KCl content.When the amount of KCl was 3 phr

the tensile strength and notch impact strength of the PA6/KCl composities reached the maximum values of 82.67 MPa and 7.34 kJ/m

respectively

which presented 10.8% and 34.68% improvement compared to those of the pure PA6.The dynamic mechanical property measurement results demonstrated that the storage modulus of the composite materials was higher than that of pure PA6 in the measuring temperature range

and the storage modulus of the composites increased with the increase of KCl content.The crystallization behavior results reveal that with the addition of KCl content

the temperature of nucleation

the growth temperature of crystal

the melt temperature of crystal and the glass transition temperature of spherulites dramatically decreased.The density and the rate of nucleation also decreased gradually

the crystallization ability of PA6/KCl composites decreased and the crystallinity decreased from 20.30% to 19.34%

the crystallization induction time gradually increased.The rheological property results showed that with the increase of KCl content

the composites exhibited zero shear viscosity and pseudo plastic fluid behavior

and the phenomenon of shear thinning became more and more obvious

the changes in relaxation mechanism led to the gradually increase in the characteristic relaxation time

and

关键词

PA6共混物结晶行为流变行为力学性能

Keywords

PA6BlendCrystallizationRheologyMechanical properties

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Related Author

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Related Institution

College of Materials Science and Engineering, Qingdao University

Department of Polymer Science and Engineering, Zhejiang University

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University

Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University

Zheda Institute of Advanced Materials and Chemical Engineering

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