摘要
采用热失重分析仪、扫描电子显微镜、电感耦合等离子体光谱仪、热重-质谱联用仪、卡尔费休水分仪等对单组分脱醇型有机硅密封胶进行了对比测试和分析,探讨了其“返粗”原因。结果表明,“返粗”密封胶经80℃×6 h热处理后,可视粒子完全消失,且热处理温度越高消失越快;密封胶硫化前,“返粗”部分在100℃和250℃处,比未“返粗”部分明显多出2个热失重峰,其质量损失率分别为2%和7%;密封胶“返粗”可能与纳米碳酸钙和钛配合物无关;“返粗”密封胶中起粒部分和非起粒部分水的质量分数分别为0.60%和0.45%,起粒部分中可能存在水的富集情况,“返粗”问题可能与密封胶中水的质量分数较高有直接关系。
The one-component dealcoholized silicone sealant was tested and analyzed by thermogravimetric analyzer,scanning electron microscope,inductively coupled plasma spectrometer,thermogravimetry mass spectrometry and Karl Fischer moisture analyzer.The results show that the visible particles disappear completely after the re-agglomeration sealant is heat-treated at 80℃for 6 h,and the higher the heat treatment temperature is,the faster the visible particles disappear.Before the sealant is vulcanized,for the re-agglomeration part at 100℃and 250℃,there are two more thermogravimetric peaks than that with the non re-agglomeration part,with the mass loss rate of 2%and 7%respectively.The re-agglomeration phenomena of the sealant may have nothing to do with nanometer calcium carbonate and titanium complexes.The mass fraction of water in the granulated part and non-granulated part of the re-agglomeration sealant are 0.60%and 0.45%respectively.There may be water enrichment in the granulated part,and the phenomena of re-agglomeration may be directly related to the higher water content in the sealant.
作者
朱勇
梁力戈
谢宇达
方贵坜
蓝彩珍
卢新莲
叶小机
张安将
ZHU Yong;LIANG Li-ge;XIE Yu-da;FANG Gui-li;LAN Cai-zhen;LU Xin-lian;YE Xiao-ji;ZHANG An-jiang(Guangxi Huana New Materials Technology Co.,Ltd.,Nanning 530100,Guangxi;China National Analytical Center,Guangdong Institute of Analysis,Guangdong Academy of Sciences,Guangzhou 510070,Guangdong;Ningbo Institute of Materials Technology&Engineering,CAS,Ningbo 315201,Zhejiang)
出处
《有机硅材料》
CAS
2020年第5期15-20,共6页
Silicone Material
基金
广西科技厅创新驱动发展专项(桂科AA17202030)。
关键词
有机硅
密封胶
脱醇型
返粗
起粒
甲醇
水
silicone
sealant
dealcoholization
re-agglomeration
granulation
methanol
water
