Effects of Zinc oxide nanoparticles on the morphology and viscoelastic properties of polyamide 6/poly(butylene terephthalate) blends

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• 作者：Li Wang ; Zhao-xia Guo 郭朝霞 ; Jian Yu 于建
• 关键词：Zinc oxide ; Polyamide 6 ; Poly(butylene terephthalate) ; Morphology ; Rheology
• 刊名：Chinese Journal of Polymer Science
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：35
• 期：3
• 页码：434-445
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials; Condensed Matter Physics;
• 出版者：Chinese Chemical Society and Institute of Chemistry, CAS
• ISSN：1439-6203
• 卷排序：35

文摘

The morphology of polyamide 6/poly(butylene terephthalate) (PA6/PBT, 70/30, W/W) blends filled with pristine Zinc oxide (ZnO) nanoparticles and ZnO surface-modified by γ-glycidoxypropyltrimethoxysilane (K-ZnO) was investigated. The incorporation of ZnO and K-ZnO by one-step compounding both resulted in a smaller size and narrower distribution of PBT domains and the effect of ZnO was greater than K-ZnO. To reveal the underlying mechanism, two-step compounding in which ZnO or K-ZnO was premixed with PA6 or PBT was conducted and the finest morphology was achieved when mixing PA6 with premixed PBT/ZnO. Transmission electron microscopy (TEM) demonstrated that ZnO was distributed in PBT in all cases and K-ZnO was enriched at the interface except when K-ZnO was premixed with PBT. ZnO and K-ZnO caused a deterioration in the melt rheological properties of PBT, which played a dominating role in the morphological changes. In addition, the interfacial localization of K-ZnO enhanced the dynamic rheological properties of PA6/PBT blends substantially.