不同改性剂对ABS/CaCO_3复合材料性能的影响  

Effects of Different Modifiers on Properties of ABS/CaCO_3 Composites

作　　者：彭鹤松 宋世坤 王光硕 冯才敏 Peng Hesong;Song Shikun;Wang Guangshuo;Feng Caimin(Jiangxi Guangyuan Chemical Limited Company, Ji’an 331500, China;School of Materials Science and Engineering, Hebei University of Engineering, Handan 056038, China;School of Applied Chemical Technology, Shunde Polytechnic, Foshan 528333, China)

机构地区：[1]江西广源化工有限责任公司,江西吉安331500 [2]河北工程大学材料科学与工程学院,河北邯郸056038 [3]顺德职业技术学院应用化工技术学院,广东佛山528333

出　　处：《工程塑料应用》2017年第10期126-131,共6页Engineering Plastics Application

摘　　要：首先采用不同改性剂对超细重质碳酸钙(CaCO_3)进行表面改性,然后作为无机填料填充丙烯腈–丁二烯–苯乙烯塑料(ABS),制备ABS/CaCO_3复合材料,研究了不同改性剂添加量和改性时间对CaCO_3吸油值、接触角和沉降体积的影响,测试了复合材料的力学性能、熔体流动速率(MFR)和热稳定性,并采用扫描电子显微镜观察了CaCO_3粒子在ABS基体中的分散性。结果表明:经不同改性剂表面处理后,CaCO_3的吸油值和沉降体积降低,接触角增大,其中以大分子活性硅烷(JST-3G)改性的CaCO_3的吸油值和沉降体积(60 min)最小,接触角最大,分别为16 m L/(100 g),0.2 m L/g和120°。经过表面改性的CaCO_3显著提高了复合材料的力学性能和加工流动性,改善了CaCO_3粒子在ABS基体中的分散性。采用大分子活性硅烷(JST-3G)改性的CaCO_3制备的复合材料的力学性能和加工流动性最佳,其拉伸强度、弯曲强度、简支梁缺口冲击强度和MFR分别达到了39.2 MPa,71.2 MPa,13.2 k J/m^2和37.6 g/(10 min)。经不同改性剂处理后,CaCO_3粒子在ABS基体中的分散性均有所提高,尤其以大分子活性硅烷(JST-3G)改性的CaCO_3在ABS基体中的分散性最优。The surfaces of superfine heavy calcium carbonate(CaCO3)powders were firstly treated by different modifiers,then as inorganic fillers were added into acrylonitrile-butadiene-styrene plastic(ABS)to prepare ABS/CaCO3composites.The effects of different modifier content and modification time on the oil absorption value,sedimentation volume and contact angle of CaCO3were studied.The mechanical properties,melt flow rate(MFR)and thermal stability of composites were investigated and the dispersion of CaCO3particles in ABS matrix was observed by scanning electron microscopy.The results show that the surface of CaCO3particles were treated,the oil absorption value and sedimentation volume of modified CaCO3particles decrease as well as the contact angle increases.The CaCO3treated by macromolecules-based active siloxane(JST-3G)exhibites minimum oil absorption value and sedimentation volume(60min)as well as maximum contact angle,the values are16mL/(100g),0.2mL/g and120°,respectively.The modified CaCO3is able to enhance the mechanical properties of the composites,increase the processing fluidity and improve the dispersion of modified CaCO3particles in the ABS matrix.Compared with other modified samples,the composite containing the fillers of CaCO3treated by macromolecules-based active siloxane(JST-3G)showes better mechanical properties and processing fluidity.The values of tensile strength,flexural strength,charpy notched impact strength and MFR are39.2MPa,71.2MPa,13.2kJ/m2and37.6g/(10min),respectively.The dispersion of CaCO3particles in ABS matrix is enhanced after surface modification,especially the composite based on CaCO3treated by macromolecules-based active siloxane(JST-3G)has an better dispersion.

关 键 词：改性剂 超细重质碳酸钙 丙烯腈–丁二烯–苯乙烯塑料 力学性能 分散性 

分 类 号：TQ327.8[化学工程—合成树脂塑料工业]