热带作物学报2024，Vol.45Issue(8)：1696-1704,9.DOI:10.3969/j.issn.1000-2561.2024.08.019
新品系云研774浓缩天然胶乳贮存性能研究
Storage Properties of Yunyan 774 Concentrated Natural Latex
摘要
Abstract
Yunyan 774 is a newly bred rubber tree cultivar in Yunnan,the research on its latex composition and proper-ties is of great significance for its popularization and application.The changes of non-rubber components and colloidal properties,molecular weight and distribution of Yunyan 774 concentrated natural latex during storage,as well as the differences of crosslinking density,physical and mechanical properties,aging properties and latex particle size and dis-tribution after 90 days of storage were measured and analyzed.The experimental results showed that the total solid content and ash content of Yunyan 774 remained unchanged after 90 days of storage,and the dry rubber content de-creased by 1.1％,which was related to the reaction of some non-adhesive substances to form substances that could not be precipitated by adding acid.The content of volatile matter decreased slightly,but the content of acetone soluble con-tent,water soluble content and nitrogen increased in different degrees.The content of advanced fatty acids of Yunyan 774 increased with the extension of storage time,and the ammonium soap with protective effect was generated,which played a role in improving the mechanical stability in the early stage.The thermal stability decreased gradually,and the viscosity decreased first and then was basically constant.The increase of volatile fatty acid content was not conducive to the preservation of latex.The physical mechanical properties and aging properties of Yunyan 774 latex vulcanized rub-ber film were better than those of the mixed strain.Compared with the mixed strain,the molecular weight distribution of Yunyan 774 was wider,the molecular weight was slightly lower,and the particle size was not different.关键词
浓缩天然胶乳/云研774/非胶组分/胶体性能/力学性能Key words
concentrated natural latex/Yunyan 774/non-colloidal component/colloidal properties/mechanical property分类
化学化工引用本文复制引用
万立红,仪明源,方林,汪志芬,廖建和..新品系云研774浓缩天然胶乳贮存性能研究[J].热带作物学报,2024,45(8):1696-1704,9.基金项目
广东省重点领域研发计划项目(No.2020B020217001). （No.2020B020217001）
