摘要
以空心玻璃微珠(HGB)为填料,采用取向加工工艺技术制备了取向HGB/PP复合材料。采用SEM、DSC等研究了HGB含量对取向加工前后HGB/PP复合材料微观结构和熔融结晶行为的影响,同时考察了HGB含量对取向复合材料的力学性能和耐热性能的影响。结果表明,HGB在复合材料中分散均匀,且取向加工后使复合材料产生了梭形空穴,大幅降低了材料的密度。取向加工工艺使复合材料的结晶度有所提高,但随着HGB含量的增加,复合材料结晶度逐渐降低。所得取向HGB/PP复合材料具有极高的力学强度,拉伸强度可达200 MPa,拉伸模量可达5 GPa,缺口冲击强度可达200 kJ/m 2以上。HGB的加入能够大幅提高复合材料的耐热性能,其热变形温度随着HGB含量的增加表现为先上升后下降的趋势。
The oriented hollow glass beads(HGB)/polypropylene(PP)composite material with HGB as the filler was prepared by orientation processing technology.The influence of HGB contents on the microstructure and melting crystallization behavior of HGB/PP composites before and after orienting was studied by scanning electron microscope(SEM)and differential scanning caborimetry(DSC).At the same time,the influence of HGB contents on the mechanical properties and heat resistance of oriented composites was investigated.The experimental results show that HGB is well dispersed in the composite material,and the composite material produces shuttle-shaped cavities after stretching,which greatly reduces the density of the material.The orientation processing technology improves the crystallinity of the composite material,but as the content of HGB increases,the crystallinity of the composite material gradually decreases.The obtained oriented HGB/PP composite material has extremely high mechanical strength which basically decreases with the increase of HGB content.The tensile strength could achieve 200 MPa,the tensile modulus can reach 5 GPa,and the notched impact strength can reach more than 200 kJ/m 2.The addition of HGB can greatly improve the heat resistance of composite materials,and with the increase of HGB content the tendency of heat distortion temperature shows rising at the beginning and then declining.
机构地区
中国石化北京化工研究院
中国石油化工集团有限公司
出处
《塑料工业》
CAS
CSCD
北大核心
2021年第4期81-86,111,共7页
China Plastics Industry
基金
新能源产业技术创新专项“共挤型无氟背板关键技术”(20314304D)。
关键词
聚丙烯
空心玻璃微珠
取向加工
微观形貌
力学性能
耐热性能
Polypropylene
Hollow Glass Beads
Orientation Processing
Microscopic Morphology
Mechanical Properties
Heat Resistance
