{"title":"Flow enhanced high-filled polyamide composites without the strength-flowability trade-off","authors":"Daeyul Kwon, Seung-Kyu Park, Youngjae Yoo","doi":"10.1007/s00289-024-05419-2","DOIUrl":null,"url":null,"abstract":"<p>Polyamide (PA) composites exhibit excellent properties such as stiffness, impact resistance, chemical resistance, and thermal stability, making them widely used in automotive interiors, engine parts, and bodywork. To leverage these advantages, high-content composite materials that enhance the wettability and interfacial adhesion between polyamide 66 (PA66) and glass fiber are essential. In this study, we synthesized linear and hyperbranched amide-based flow modifiers to improve the flowability of PA66 composites. H-NMR and FT-IR analyses confirmed the successful preparation of these structures. FT-IR analysis confirmed the successful synthesis of flow modifiers, showing characteristic amide peaks at 1650 cm<sup>−1</sup> and the absence of -NH<sub>2</sub> peaks at 3300 cm<sup>−1</sup>. Five flow modifiers were mixed with PA66 in various ratios using a micro-compounder, and viscosity reduction was confirmed by rotational rheometer measurements. Tensile strength and DMA indicated that PA66 composites with flow modifiers showed improved mechanical properties without significant reduction. Notably, PA66 composites with ACDA exhibited a superior viscosity reduction effect while maintaining mechanical strength. The DMA results indicated that the mechanical properties of PA66 composites with flow modifiers showed no significant reduction. The tensile strength of samples with flow modifiers ranged from 208 to 212 MPa, and the elongation at break was between 8.94 and 9.18%. These findings demonstrate that the synthesized flow modifiers improve the viscosity of PA66 composites while maintaining or enhancing mechanical properties.</p>","PeriodicalId":737,"journal":{"name":"Polymer Bulletin","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Bulletin","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s00289-024-05419-2","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Polyamide (PA) composites exhibit excellent properties such as stiffness, impact resistance, chemical resistance, and thermal stability, making them widely used in automotive interiors, engine parts, and bodywork. To leverage these advantages, high-content composite materials that enhance the wettability and interfacial adhesion between polyamide 66 (PA66) and glass fiber are essential. In this study, we synthesized linear and hyperbranched amide-based flow modifiers to improve the flowability of PA66 composites. H-NMR and FT-IR analyses confirmed the successful preparation of these structures. FT-IR analysis confirmed the successful synthesis of flow modifiers, showing characteristic amide peaks at 1650 cm−1 and the absence of -NH2 peaks at 3300 cm−1. Five flow modifiers were mixed with PA66 in various ratios using a micro-compounder, and viscosity reduction was confirmed by rotational rheometer measurements. Tensile strength and DMA indicated that PA66 composites with flow modifiers showed improved mechanical properties without significant reduction. Notably, PA66 composites with ACDA exhibited a superior viscosity reduction effect while maintaining mechanical strength. The DMA results indicated that the mechanical properties of PA66 composites with flow modifiers showed no significant reduction. The tensile strength of samples with flow modifiers ranged from 208 to 212 MPa, and the elongation at break was between 8.94 and 9.18%. These findings demonstrate that the synthesized flow modifiers improve the viscosity of PA66 composites while maintaining or enhancing mechanical properties.
期刊介绍:
"Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad.
"Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."