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Effect of split addition of initiator and antioxidant in radiation vulcanised natural rubber latex
Radiation Effects and Defects in Solids ( IF 1.1 ) Pub Date : 2021-08-02 , DOI: 10.1080/10420150.2021.1935945
Neethu Varghese 1 , Siby Varghese 1 , Vaishak Nambiathodi 1 , Thomas Kurian 2
Affiliation  

In radiation vulcanisation of natural rubber latex (RVNRL), the crosslinking of rubber particles is brought about by γ-radiation from a 60Co source. The optimum radiation dose for obtaining maximum properties for RVNRL film is 15 k.Gy. The residual n-BA in the latex causes several problems in the products derived from the latex. The split dose addition of n-BA was proposed to overcome this difficulty. The order of addition of antioxidants also has some effect on radiation crosslinking reaction as antioxidants are the free radical scavengers. Accordingly, the effect of different modes of addition of antioxidant, on mechanical properties of the vulcanisates, was studied. Among the different methods attempted the addition of antioxidant at mid time (M.I) and after irradiation (A.I) registered better mechanical properties and better thermal stability.



中文翻译:

辐照硫化天然胶乳中引发剂和抗氧剂分次添加的影响

在天然橡胶胶乳 (RVNRL) 的辐射硫化中,橡胶颗粒的交联是由60 Co 源的γ 辐射引起的。获得 RVNRL 薄膜最大性能的最佳辐射剂量为 15 k.Gy。胶乳中残留的n -BA 在由胶乳衍生的产品中引起若干问题。n的分剂量加法-BA 被提出来克服这个困难。抗氧化剂的添加顺序对辐射交联反应也有一定的影响,因为抗氧化剂是自由基清除剂。因此,研究了抗氧化剂的不同添加方式对硫化橡胶机械性能的影响。在不同的方法中,尝试在中间时间 (MI) 和辐照后 (AI) 添加抗氧化剂,获得更好的机械性能和更好的热稳定性。

更新日期:2021-08-12
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