掺杂氧化钐的炭黑用量对粉末天然橡胶性能的影响  

Effect of amounts of carbon black doped with samarium oxide on properties of powdered natural rubber

作　　者：郭宇波[1] 王炼石[1] 张安强[1] 

机构地区：[1]华南理工大学材料科学与工程学院高分子材料科学与工程系,广东广州510640

出　　处：《合成橡胶工业》2007年第2期138-142,共5页China Synthetic Rubber Industry

基　　金：广东省自然科学基金资助项目(031366)

摘　　要：高耐磨炉黑（HAF）填充型粉末天然橡胶（NR）[P（NR/HAF）]硫化胶的缺点是300%定伸应力低,因此,采用Sm2O3掺杂HAF（HAF-Sm）,用凝聚共沉法制备了掺杂Sm2O3的HAF填充型粉末天然橡胶（NR）[P（NR/HAF-Sm）],研究了其硫化胶的力学性能与Sm2O3及HAF用量之间的关系。结果表明：在炭黑用量为10-100份,当炭黑用量相同、Sm2O3的质量分数为HAF的3%时,其P（NR/HAF-Sm）硫化胶的300%定伸应力显著高于P（NR/HAF）硫化胶,而与块状NR（MNR）/HAF机械混炼胶料硫化胶的相近;其拉伸强度、100%定伸应力和撕裂强度明显高于P（NR/HAF）及MNR/HAF硫化胶。这说明适量的Sm2O3掺杂HAF可显著提高炭黑填充型粉末NR硫化胶的300%定伸应力及其他力学性能。The disadvantage of high abrasion furnace black （HAF） filled powdered natural rubber （NR） [ P（NR/HAF） ] vulcanizate had lower modulus at 300%. To improve modulus at 300% of it, Sm2O3 doped HAF（HAF-Sm） was used to prepare HAF-Sm filled powdered NR[ P（NR/HAF-Sm）] by means of coacervation-coprecipitation. The relationships between the mechanical properties of P （NR/ HAF-Sm） vulcanizates with the amounts of Sm2O3 and HAF were studied. The results showed that the modulus at 300% of P（NR/HAF-3 Sm） vulcanizate, doped mass fraction of Sm2O3 3% （compared to HAF）, was remarkably higher than that of P（NR/HAF） vulcanizate when the amount of HAF was the same, and approached to that of massive NR （MNR）/HAF vulcanizate. The tensile strength, modulus at 100% and tear strength of P（ NR/HAF- 3 Sm） vulcanizate were obviously higher than that of P（NR/HAF） and MNR/HAF, which proved that suitable doped amount of Sm2O3 could remarkably improve modulus at 300% and other mechanical properties of P（NR/HAF） vulcanizate.

关 键 词：粉末天然橡胶 高耐磨炉黑 氧化钐 力学性能 

分 类 号：TQ332[化学工程—橡胶工业]