The silicone resin is synthesized using hydrolysis-polycondensation method from phenyl and methyl chlorosilane,and the factors influencing this synthesis are investigated.The results indicate that silicone resin can be synthesized when the hydrolysis temperature is 70℃ and n(H2O)/n(Cl)is between 5:1 and 8:1.And the IR analysis shows that silicone resin possesses hydroxyl end group.The thermal properties are investigated using thermo-gravimetric analysis(TG),differential thermogravimetric analysis(DTG)and muffle furnace test,and the effects of curing agents,such as KH-CL and triethanolamine,on the thermal properties of silicone resin were also discussed.It is found that silicone resin possesses excellent thermal stability with onset degradation temperature at about 400 ℃,and its mass loss is mainly caused by the "unzipped degradation" occurred between 400-500 ℃,and the "rearranged degradation" occurred after 500 ℃.But it thermal properties decreases at air atmosphere duo to the oxidative-degradation of organic groups.Silicone resin can cure at room temperature with KH-CL,and its thermal stability is improved after cured.
Key words
methylphenylsiloxane /
heat-resistance /
hydroxyl end group /
curing at room tempe /
thermal degradation
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
JELENA D J,MILUTIN N G.The thermogravimetric analysis of some polysiloxanes [J].Polymer Degradation and Stability,1998,61:87-93.
杜作栋,陈剑华,贝小来,等.有机硅化学[M].北京:高等教育出版社,1990.
王宏刚.耐热有机硅树脂研究进展[J].粘接,2000,3:29-33.
SCHMIDT M J J,LOW D K Y,LI L.Laser ablation of B4Cpolysiloxane composite [J].Applied Surface Science,2002,186:271-275.
ZENG J P,LI Y,WU Y X,ZHANG J.Research on application of silicone resin in SiO2 matrix composite[J].Aerospace Materials Technology,1997,27(3):26-31.
KEIJMAN K.Use of novel siloxane hybrid polymers in protective coatings [J].Oil Gas-European Magazine.1997,23(3):38-40.
BRYTE.High performance radome antenna materials[J].High Performance Composites,1999,(1):15-23.
郭广生,顾冬梅,王志华,等.有机硅加固材料的合成及应用[J],2000,27(1):98-100.
梅玉娇,刘爱婷.有机硅乳液的剖析[J].染整技术,2000,(1):42-44.
付善菊,韩哲文.聚硅氧烷热稳定性研究进展[J].高分子通报,2001,(1):40-46.
ADHAKRISHNAN T S.New method for evaluation of kinetic parameters and mechanism of degradation from pyrolysis-GC studies:thermal degradation of polydimethylsiloxanes [J].Journal of Applied Polymer Science,1999,73:441-450.
ODON W,GABOR K.A new catalytic method for crosslinking of silicone polymers [J].Journal of Applied Polymer Science.1998,69:1705-1709.
彭文庆,谢择民.高热稳定性硅橡胶的研究[J].高分子通报,2000,(3):1-7.
幸松民.有机硅单体及聚合物[M].北京:化学工业出版社,1986.
幸松民,王一璐.有机硅合成工艺及产品应用.北京:化学工业出版社,2000.
刘正堂,王红,姚咸斌,等.抗燃气流冲刷、烧蚀的耐高温涂料的研制[J].现代涂料与涂装,2003,(3):6-9.
ZHANGYM,YING H,LIU X L and YU Y Z.Studies on the silicone resins cured with polymethylsilazanes at ambient temperature [J].Journal of Applied Polymer Science,2003,89:1702-1707.
王清正,师彤,谢择民,等.硅氮聚合物交联剂交联的室温硫化硅橡胶的热稳定性.高分子学报.1994,(5):573-577.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(522 KB)
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}
