氟修饰天然胶乳的制备及其乳胶膜的耐紫外与耐臭氧特性研究  

Preparation of Fluorinated Natural Rubber Latex and Its UV and Ozone Resistance of Latex Film

作　　者：程仕泓 刘欢[1] 蔡嘉俊 李松杨 赵富春[1] 廖双泉[1] Shi-hong Cheng;Huan Liu;Jia-jun Cai;Song-yang Li;Fu-chun Zhao;Shuang-quan Liao(School of Materials Science and Engineering,Key Laboratory of Advanced Materials of Tropical Island Resources,Ministry of Education,Hainan University,Haikou 570228)

机构地区：[1]海南大学材料科学与工程学院热带岛屿资源先进材料教育部重点实验室,海口570228

出　　处：《高分子学报》2023年第8期1253-1261,共9页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号52063012);海南省自然科学基金(基金号323MS012,2019RC115);海南省普通高等学校研究生创新科研课题(基金号Qhys2021-153)资助。

摘　　要：为了解决天然橡胶(natural rubber,NR)中不饱和双键结构所造成的耐老化性能差的问题,基于引入具有优异稳定性的含氟丙烯酸酯组分的策略,在温和条件下,以天然胶乳(NRL)为原料,以甲基丙烯酸十二氟庚酯为单体,在乳液聚合反应体系中制备了氟修饰天然胶乳(FNRL).结果表明,FNRL具有良好的基本质量指标和稳定性.FNR硫化乳胶膜(FNR-V)具有良好的耐紫外线、耐臭氧性能.经加速紫外老化试验后,FNR-V乳胶膜的裂纹宽度仅为NR硫化乳胶膜(NR-V)的1/3.在臭氧老化试验后,FNR-V乳胶膜的表面开裂评价达到1a级,而NR-V乳胶膜的为4c级.本文在温和条件下成功制备了氟修饰天然胶乳,其硫化乳胶膜相较于纯NR具有显著提高的耐紫外、耐臭氧性,展示出了在更严苛的紫外、臭氧环境条件下的良好应用前景.Based on a strategy of combining fluorinated components with excellent stability,fluorinated natural rubber latex(FNRL)was synthesized by emulsion polymerization with NR latex(NRL)using fluorinated acrylates as monomers under mild conditions to solve the problem of poor ageing resistance caused by the unsaturated structure in natural rubber(NR).The fluorination of NRL resulted in the synthesis of FNRL with high stability and FNR latex films with excellent UV and ozone resistance.The results show that FNRL has high stability and its mechanical stability and thermal stability are qualified,which is slightly better than that of the commercial concentrated latex.FNR vulcanized(FNR-V)latex film has better UV and ozone resistance than those of NR vulcanized(NR-V)latex film.After accelerated UV aging test,the crack width of the FNR-V latex film is only 1/3 of that of the NR-V latex film.After ozone aging test,the surface cracking of FNR-V latex films is evaluated at level 1a,while that of NR-V is level 4c.This study provides a feasible way of fluorinated NRL,whose vulcanized latex film has significant improvements in UV and ozone resistance compared to NR latex film,and FNR-V latex film is expected to be widely used under more severe climatic conditions(UV and ozone).

关 键 词：氟修饰天然胶乳 稳定性 耐紫外 耐臭氧 

分 类 号：TQ331.2[化学工程—橡胶工业]