摘要
制备了不同低模量高延伸率室温硫化有机硅密封材料,并考察了扩链剂类型和用量、固化温度和时间对材料性能和交联度的影响。结果表明,酰胺型扩链剂效果明显;温度过高或过低的硫化对力学性能不利。30°С硫化7天交联度可达到80%以上,各种力学性能均可达到使用要求。
The effects of type, concentration of chain extender, curing temperature and time of silicone sealants with low modulus and high elongation on their mechanical properties were studied. The results reveal that the chain extending effect of diacetamidosilane is prominent and the mechanical properties of the systems with diketoximosilane chain extender are better when they are cured at 30℃. After curing for 7 d at 30 ℃, the curing degree of the system is over 80% and the mechanical properties fulfil well the requirements.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第6期221-223,共3页
Polymer Materials Science & Engineering
基金
"863"国家高技术研究发展计划(2003AA327030)
国家杰出青年科学基金(50125312)资助
关键词
有机硅密封材料
低模量
扩链剂
交联度
力学性能
silicone sealant
low modulus
chain extender
curing degree
mechanical properties
