The Role of Non-Rubber Components on Molecular Network of Natural Rubber during Accelerated Storage

Though the non-rubber components have long been recognized to be a vital factor affecting the network of natural rubber (NR), the authentic role of non-rubber components on the network during accelerated storage has not been fully illuminated. This work attempts to clarify the impact of non-rubber c...

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Bibliographic Details
Published in:Polymers 2020-11, Vol.12 (12), p.2880
Main Authors: Zhang, Huifeng, Zhang, Lu, Chen, Xu, Wang, Yueqiong, Zhao, Fuchun, Luo, Mingchao, Liao, Shuangquan
Format: Article
Language:English
Subjects:
Crosslinking
Mechanical properties
Natural rubber
Network formation
Particle size
Proteins
Rubber
Strain analysis
Stress-strain curves
Thin films
Viscosity
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Summary:Though the non-rubber components have long been recognized to be a vital factor affecting the network of natural rubber (NR), the authentic role of non-rubber components on the network during accelerated storage has not been fully illuminated. This work attempts to clarify the impact of non-rubber components on the network for NR during accelerated storage. A natural network model for NR was proposed based on the gel content, crosslinking density, and the non-rubber components distribution for NR before and after centrifugation. Furthermore, the effect of non-rubber components on the network was investigated during accelerated storage. The results show that terminal crosslinking induced by non-rubber components and entanglements are primary factors affecting the network formation during accelerated storage. By applying the tube model to analyze the stress-strain curves of NR, we found that the contribution of the entanglements to the network formation is larger than that of terminal crosslinking during accelerated storage. The work highlights the role of non-rubber components on the network during accelerated storage, which is essential for understanding the storage hardening mechanism of NR.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym12122880