文章摘要
Effect of Constant Viscosity Agents on Properties of Constant Viscosity NR Prepared by Microbial Coagulation of Fresh Natural Latex
Received:December 16, 2022  Revised:December 23, 2022
DOI：10.12136/j.issn.1000-890X.2024.02.0121
Key Words: constant viscosity NR；constant viscosity agent；natural latex；vulcanization characteristic；tensile property
Author NameAffiliationE-mail
Luo Zirong* agricultural processing research institute,chinese academy of tropical agricultural sciences luozirong3@163.com 
Zhang Beilong agricultural processing research institute,chinese academy of tropical agricultural sciences  
Tao Jinlong agricultural processing research institute,chinese academy of tropical agricultural sciences  
Kong Na agricultural processing research institute,chinese academy of tropical agricultural sciences  
Li Zhifeng agricultural processing research institute,chinese academy of tropical agricultural sciences  
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Abstract:
      The effect of constant viscosity agents（hydroxylamine hydrochloride，hydroxylamine sulfate，hydrated hydrazine，aminourea hydrochloride and aniline） on the properties of constant viscosity natural rubber（NR） prepared by microbial coagulation of fresh natural latex was studied.The results showed that as the contents of hydroxylamine hydrochloride and hydroxylamine sulfate in the constant viscosity NR increased，the t90 of the compounds first extended and then shortened，and the vulcanization rates（Vc） first decreased and then increased.As the contents of hydrated hydrazine and aminourea hydrochloride in the constant viscosity NR increased，the t90 of the compounds extended，and the Vc decreased.As the aniline content of constant viscosity NR increased，the ts2 of the compound extended，and the t90 first extended and then shortened.As the contents of hydroxylamine hydrochloride and hydroxylamine sulfate in the constant viscosity NR increased，the moduli at 300% elongation and tensile strengths of the compounds decreased.For the constant viscosity NR compound containing hydrated hydrazine，as the hydrated hydrazine content increased，the tensile strength of the compound increased，but it was smaller than that of the blank sample.When the contents of aminourea hydrochloride and aniline in the constant viscosity NR were 0.05%～0.10%，the compounds could achieve larger tensile strengths and elongations at break.
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