稀土掺杂炭黑填充型粉末天然橡胶 (Ⅱ)微观结构与成粉机理

Rare earth modified carbon black filled powdered natural rubber (Ⅱ) characterization and powdering mechanism

采用扫描电镜（SEM）和透射电镜（TEM）对稀土镝掺杂炭黑填充型粉末天然橡胶EP（NR／HAF—Dy）]颗粒进行表面和截面微观分析，发现稀土镝掺杂炭黑（HAF—Dy）已在橡胶基体中形成良好分散，其平均分散粒径达到50～200nm。在此基础上，结合P（NR／HAF—Ln）的制备工艺，提出了P（NR／HAF—Dy）的成粉机理模型，认为在水相中良好分散的HAF—Dy与NR乳胶粒结合所形成的NR／炭黑凝胶网络粒子是构成P（NR／HAF—Dy）的基本单元，这也是HAF—Dy能在NR中形成纳米级分散的主要原因。

Rare earth modified carbon black particles were analyzed using TEM and SEM,the persed in the rubber matrix with the diameter of filled powdered natural rubber [-P（NR/HAF-Dy）] results showed that carbon black have been well dis- 50 to 200 nm. According to the preparation procedure of P（NR/HAF-Ln） and the microscopic analysis of P（NR/HAF-Dy） particles,the nism of P（NR/HAF-Dy） was put forward. The carbon black gel network formed HAF-Dy and NR latex particles was the primary unit of P（NR/HAF-Dy） particle. why HAF-Dy can disperse in NR matrix with nano-meter size. powdering mecha by well-dispersed That is the reason