Enhancement of thermal, morphological, and mechanical properties of compatibilized based on PA6‐enriched graphene oxide/EPDM‐g‐MA/CR: Graphene oxide and EPDM‐g‐MA compatibilizer role,Journal of Applied Polymer Science

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Enhancement of thermal, morphological, and mechanical properties of compatibilized based on PA6‐enriched graphene oxide/EPDM‐g‐MA/CR: Graphene oxide and EPDM‐g‐MA compatibilizer role
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-09-17 , DOI: 10.1002/app.49901
Mohammad Javad Azizli _{1,

2,

3} , Mohammad Barghamadi ₄ , Katayoon Rezaeeparto ₅ , Masoud Mokhtary ₁ , Somayeh Parham ₅ , Vahabodin Goodarzi ₆ , Sedigheh Soltani ₄

Affiliation

In this study, a series of elastomeric nanocomposites based on specific amounts of polyamide6 (PA6)/chloroprene rubber (CR) blends which are compatibilized with ethylene propylene diene monomer‐grafted‐maleic anhydride (EPDM‐g‐MA) and different amounts of graphene oxide (GO) were prepared with melt mixing method. The effect of compatibilizer and reinforcement concentration in the PA6/CR blend matrix was investigated using theoretical and experimental analysis. Dispersion of nanoplatelets within rubber blend matrix was proven with transmission electron microscopy and field emission‐scanning electron microscopy. The modified microstructure of samples showed the significant effect of EPDM‐g‐MA and GO on the size reduction of CR droplets in the PA6 continuous phase. The results from differential scanning calorimetry and dynamic mechanical thermal analysis revealed the effect of EPDM‐g‐MA and GO as an effective nucleating agent in PA6‐enriched GO/CR (PA6EGO/CR). The findings obtained from thermogravimetric analysis displayed that the GO in the presence of an EPDM‐g‐MA as a compatibilizer can cause a higher thermal stability in PA6EGO/CR. From mechanical properties, by adding a compatibilizer to the PA6/CR blend, the tensile strength changed from 39.0 to 45.1, the Young's modulus altered from 522.2 to 716.0 and the elongation at break changed from 246.8 to 222.2. While incorporation of 5 phr of GO to the compatibilized blend, the tensile strength increased by 25.2%, the Young's modulus increased by 36.6% and the elongation at break decreased by 20%. The Christensen–Lo model used for analyzing the stiffness of PA6EGO/EPDM‐g‐MA/CR with emphasis on the influence of the interphase region to predict the effect of various loadings of GO and EPDM‐g‐MA of Young's modulus. The rheology and creep tests showed a significant effect of EPDM‐g‐MA and GO content on the rheology behavior of nanocomposites.

中文翻译：

基于富含PA6的氧化石墨烯/ EPDM-g-MA / CR的相容剂的热，形态和机械性能的增强：氧化石墨烯和EPDM-g-MA相容剂的作用

在这项研究中，一系列基于特定数量的聚酰胺6（PA6）/氯丁橡胶（CR）混合物的弹性体纳米复合材料与乙烯丙烯二烯单体接枝马来酸酐（EPDM ‐g‐ MA）和不同量的石墨烯相容用熔融混合法制备氧化铁（GO）。使用理论和实验分析研究了增容剂和补强剂在PA6 / CR共混基体中的作用。通过透射电子显微镜和场发射扫描电子显微镜证明了纳米片在橡胶共混物基质中的分散。样品微观结构的改变显示出EPDM ‐g‐的显着影响MA和GO对PA6连续相中CR液滴尺寸的减小。差示扫描量热法和动态机械热分析的结果表明，EPDM- g- MA和GO在富含PA6的GO / CR（PA6EGO / CR）中作为有效成核剂的作用。从热重分析获得的结果表明，GO在存在EPDM- g的情况下‐MA作为相容剂可以在PA6EGO / CR中产生更高的热稳定性。在机械性能方面，通过向PA6 / CR共混物中添加增容剂，拉伸强度从39.0变为45.1，杨氏模量从522.2变为716.0，断裂伸长率从246.8变为222.2。在相容的共混物中加入5 phr的GO时，拉伸强度提高了25.2％，杨氏模量提高了36.6％，断裂伸长率降低了20％。Christensen-Lo模型用于分析PA6EGO / EPDM- g- MA / CR的刚度，重点在于相间区域的影响，以预测GO和EPDM- g- MA的各种载荷对杨氏模量的影响。流变和蠕变测试表明，EPDM- g具有显着效果‐MA和GO含量对纳米复合材料流变行为的影响。

更新日期：2020-11-25

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