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Effect of the diameter of MWCNTs on shape memory and mechanical properties of polyurethane composites
Journal of Polymer Research ( IF 2.8 ) Pub Date : 2020-01-08 , DOI: 10.1007/s10965-019-2003-2
Krishan Kumar Patel , Rajesh Purohit , S. A. R. Hashmi , Ritesh Kumar Gupta

The work reported herein, effect of diameter of reinforced (MWCNTs) on shape memory and mechanical properties of shape memory thermoplastic polyurethane (SMTPU) composites. The composites containing 1 wt.% reinforced having three different MWCNTs outer diametre (OD = 10–20 nm, OD = 30–50 nm, and OD= > 50 nm) with the same length (10–30 μm) were prepared through melt mixing route by using micro-compounder followed by Injection moulding. Shape memory and mechanical properties both were significantly improved for composites. Thicker MWCNTs (at same length) leads to a less number of MWCNTs at a given wt.%, result in less percolated network and larger distance between the indivisual MWCNTs which alter the shape memory and mechanical properties. Furthermore, with increasing the diameter of reinforced MWCNTs at a same wt.% in polyurethane matrix the properties were decreased.



中文翻译:

碳纳米管直径对聚氨酯复合材料形状记忆和力学性能的影响

本文报道的工作涉及增强材料(MWCNT)的直径对形状记忆热塑性聚氨酯(SMTPU)复合材料的形状记忆和机械性能的影响。含有1%(重量)的复合物加强的具有三种不同多壁碳纳米管外DIAMETRE(OD = 10-20纳米,OD = 30-50纳米,OD => 50纳米)与所述相同的长度(10-30 微米通过熔融制备混合方法是使用微粉碎机,然后进行注塑成型。复合材料的形状记忆和机械性能均得到显着改善。在给定的重量百分比下,较厚的MWCNT(在相同的长度下)会导致MWCNT的数量减少,导致较少的渗透网络以及在单个MWCNT之间的距离变大,从而改变了形状记忆和机械性能。此外,随着聚氨酯基体中相同重量%的增强MWCNT的直径的增加,性能降低。

更新日期:2020-01-08
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