橡胶基丙烯酸酯系高吸油树脂的制备及性能

Preparation and Properties of Rubber Based Acrylic Series High Oil Absorption Resin

以丁苯橡胶(SBR)为基体,甲基丙烯酸十八酯(SMA)和乙酸乙烯酯(VAc)为聚合单体,过氧化苯甲酰(BPO)为引发剂,二乙烯基苯(DVB)为交联剂,在甲苯溶液中通过溶液聚合两步法得到新型改性高吸油树脂(R-OAR)。分别考察了单体配比、SBR、引发剂和交联剂用量作为单一影响因素对油品吸油平衡值进行了探讨,并结合傅里叶变换红外光谱(FT-IR)、热重分析(TGA)和扫描电子显微镜(SEM)对其进行表征。FT-IR表明,SMA、VAc成功接枝到SBR上,共聚形成了R-OAR;TGA表明,R-OAR热稳定性较高吸油树脂(OAR)好,分解温度提高了约50℃;单体配比为1.5∶1,SBR用量为5 g,BPO1和BPO2用量分别为4%和0.6%,交联剂为2%时,吸油平衡值达到最大,对柴油、甲苯、苯、四氯化碳分别为10.1 g/g,19.74 g/g,23.18 g/g,30.49 g/g;SEM表明,树脂中存在有利于提高其吸油能力的类交织状结构和织状间隙。

A new type of modified high oil absorption resin（ R-OAR） was prepared in toluene solution by two-step method solution polymerization,which was based on styrene butadiene rubber（ SBR） as matrix,octadecyl methyl-acrylate（ SMA） and vinyl acetate（ VAc） as monomer,benzoyl peroxide（ BPO） as initiator and divinylbenzene（ DVB） as cross-linking agent. The absorption ratio on various oils was discussed to study the relationship of structure and properties of R-OAR by the single factor which is respectively SBR dosage,initiator dosage and crosslinking agent dosage,while R-OAR was characterized by FT-IR,TGA and SEM. FT-IR result shows that SMA and VAc is successfully grafted to SBR and formed a copolymer R-OAR; TGA result shows that R-OAR has a better thermal stability than OAR,while its decomposition temperature increases about 50 ℃; when the monomer ratio（ the mass ratio of SMA and VAc） is1. 5∶ 1,the dosage of SBR is 5 g,the mass fraction of BPO1,BPO2 and DVB is respectively 4%,0. 6% and 2%,the oil absorption ratio reaches the maximum which is respectively 10. 1 g / g,23. 18 g / g and 30. 49 g / g for diesel oil,toluene,benzene,carbon tetrachloride; SEM images show that class-like intertexture structure and weaving structure gap occuring in R-OAR can improve the oil absorption.