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高度剥离的蒙脱石粘土增强热塑性聚氨酯弹性体：制备与高效增强

Highly exfoliated montmorillonite clay reinforced thermoplastic polyurethane elastomer: preparation and efficient strengthening.

作者信息

Xu Jingshui, Cheng Lihua, Zhang Zhong, Zhang Ling, Xiong Cen, Huang Weishan, Xie Yashui, Yang Liping

机构信息

Technology Research Center for Lingnan Characteristic Fruits & Vegetables Processing and Application Engineering of Guangdong Province, Food Science Innovation Team of Guangdong Higher Education Institutes, Guangdong University of Petrochemical Technology Maoming 525000 China

Guangyou-Mailon New Materials Research Institute, Guangdong Mailon New Materials Co. Ltd. Shantou 515061 China.

出版信息

RSC Adv. 2019 Mar 13;9(15):8184-8196. doi: 10.1039/c8ra10121c. eCollection 2019 Mar 12.

DOI:10.1039/c8ra10121c
PMID:35518655
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9061283/
Abstract

Highly exfoliated montmorillonite (MMT) clay reinforced thermoplastic polyurethane elastomers (TPUs) were prepared by an solution polymerization method. By using small amount of 4,4'-methylenediphenyl diisocyanate (MDI) modified pristine clay (MDI-MMT) as fillers, the mechanical properties of TPUs were greatly improved. For example, with the addition of only 1.0 wt% of MDI-MMT, the resultant TPU/MDI-MMT nanocomposites showed approximately 36% increase in initial Young's modulus, 70% increase in tensile strength and 46% increase in ultimate elongation at break as compared with those of neat TPU. Detailed study showed that, owing to the strong covalent bonding between the MMT sheets and TPU matrix, MMT sheets were highly exfoliated during the polymerization process, and the highly exfoliated MMT sheets gave rise to the greatly improved mechanical properties and thermomechanical properties of TPU/MDI-MMT nanocomposites. The present work demonstrates that the preparation of TPU/MDI-MMT nanocomposites by using MDI-MMT as fillers is a highly efficient method for reinforcing TPU.

摘要

通过溶液聚合法制备了高度剥离的蒙脱石（MMT）粘土增强热塑性聚氨酯弹性体（TPU）。使用少量4,4'-亚甲基二苯基二异氰酸酯（MDI）改性的原始粘土（MDI-MMT）作为填料，TPU的机械性能得到了极大提高。例如，与纯TPU相比，仅添加1.0 wt%的MDI-MMT，所得的TPU/MDI-MMT纳米复合材料的初始杨氏模量提高了约36%，拉伸强度提高了70%，断裂伸长率提高了46%。详细研究表明，由于MMT片层与TPU基体之间存在强共价键，MMT片层在聚合过程中高度剥离，高度剥离的MMT片层使TPU/MDI-MMT纳米复合材料的机械性能和热机械性能得到了极大改善。目前的工作表明，使用MDI-MMT作为填料制备TPU/MDI-MMT纳米复合材料是一种增强TPU的高效方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f04/9061283/8517524d05ca/c8ra10121c-s3.jpg
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