말단 비닐기를 갖는 폴리 비닐메틸 디메틸 실록산 공중합체 합성과 특성 연구

한승우; 강호종; Seung Woo Han; Ho-Jong Kang

Polymer(Korea), Vol.42, No.1, 35-40, January, 2018

DOI10.7317/pk.2018.42.1.35 Export Citation

말단 비닐기를 갖는 폴리 비닐메틸 디메틸 실록산 공중합체 합성과 특성 연구

Synthesis and Characterization of Vinyl Terminated Poly(vinylmethyl-dimethylsiloxane) Copolymer

한승우, 강호종 ^†

단국대학교 고분자공학과

Seung Woo Han, and Ho-Jong Kang^†

Department of Polymer Science and Engineering, Dankook University, Gyeonggi-do 16890, Korea

E-mail:

초록

NMR과 FTIR 실험 결과, 혼합 단량체로 사용한 octamethyl cyclosiloxane(D4)와 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane(D4 Vi)의 비에 따라 D4 Vi에 존재했던 비닐을 확인하여 poly(vinylmethyl-dimethylsiloxane)( VPVMS) 공중합체가 평형 중합에 의하여 성공적으로 합성되었음을 확인하였다. 1,3, divinyltetramethyldisiloxane( VMS)를 기준으로 D4 Vi/D4 혼합물의 D4 Vi 함량이 증가함에 따라 분자량이 큰 VPVMS를 얻을 수 있는 반면 수득률은 감소함을 확인하였다. 합성된 VPVMS 공중합체는 열에 의하여 비닐기에 의한 열 경화가 일어나 poly(dimthylsiloxane)(PDMS)에 비하여 상대적으로 열 안정성이 우수해짐을 알 수 있었다. VPVMS 공중합체는 PDMS 단일중합체에 비하여 높은 점도를 가지며 활성화에너지도 높아 상대적으로 점도의 온도 의존성이 낮음을 알 수 있었다.

Our NMR and FTIR results showed that vinyl content increased with increasing of D4 Vi when D4 Vi/D4 monomer mixture was used for the equilibrium polymerization, which indicated that poly(vinylmethyl-dimethylsiloxane) (VPVMS)was successfully synthesized. High molecular weight of VPVMS was obtained with increasing D4Vi content in monomer mixture but the yield was relatively decreased. Thermal crosslinking was found in VPVMS due to the vinyl group in main chain, which caused better thermal stability than PDMS. VPVMS copolymer has higher melt viscosity and activation energy than PDMS homopolymer. It means that VPVMS copolymer shows less temperature dependency on viscosity, compared to PDMS homopolymer.

Keywords:poly(vinylmethyl-dimethylsiloxane);equilibrium polymerization;thermal stability;activation energy

[References]

Chojnowski J, J. Inorg. Organomet. Polym., 1, 3 (1991)
Clarson SJ, Semlyen JA, Siloxane Polymer, Prentice Hall, New Jersey, pp 567 (1993).
Bak SW, Kang HJ, Kang DW, Polym. Korea, 38(2), 138 (2014)
Jarvis NL, J. Polym. Sci., 34, 101 (1971)
Laak TL, Agno SO, Barendregt A, Joop L, Hermens M, Environ. Sci. Tech., 40, 1307 (2006)
Chou C, Yang M, J. Therm. Anal. Calorim., 40, 2 (1993)
Delor-Jestin F, Tomer NS, Singh RP, Lacoste J, E-Polymers, 13, 1 (2006)
Hillborg H, Sandelin M, Gedde UW, Polymer, 42(17), 7349 (2001)
Xie K, Hou A, Shi Y, J. Dispersion Sci. Technol., 31, 321 (2010)
Kil BI, Polym. Sci. Technol., 8(3), 298 (1997)
Kim HK, Ju HT, Hong JW, Eur. Polym. J., 39, 2235 (2003)
Lotters JC, Olthuis W, Veltink PH, Bergveld P, J. Micromech. Microeng., 7, 3 (1997)
Jana RN, Nando GB, J. Elastomer Plast., 37, 149 (2005)
Lee BC, Kang DW, Polym. Korea, 28, 43 (2004)

[Referenced By]

[Related Articles]

[1] Chojnowski J, J. Inorg. Organomet. Polym., 1, 3 (1991)

[2] Clarson SJ, Semlyen JA, Siloxane Polymer, Prentice Hall, New Jersey, pp 567 (1993).

[3] Bak SW, Kang HJ, Kang DW, Polym. Korea, 38(2), 138 (2014)

[4] Jarvis NL, J. Polym. Sci., 34, 101 (1971)

[5] Laak TL, Agno SO, Barendregt A, Joop L, Hermens M, Environ. Sci. Tech., 40, 1307 (2006)

[6] Chou C, Yang M, J. Therm. Anal. Calorim., 40, 2 (1993)

[7] Delor-Jestin F, Tomer NS, Singh RP, Lacoste J, E-Polymers, 13, 1 (2006)

[8] Hillborg H, Sandelin M, Gedde UW, Polymer, 42(17), 7349 (2001)

[9] Xie K, Hou A, Shi Y, J. Dispersion Sci. Technol., 31, 321 (2010)

[10] Kil BI, Polym. Sci. Technol., 8(3), 298 (1997)

[11] Kim HK, Ju HT, Hong JW, Eur. Polym. J., 39, 2235 (2003)

[12] Lotters JC, Olthuis W, Veltink PH, Bergveld P, J. Micromech. Microeng., 7, 3 (1997)

[13] Jana RN, Nando GB, J. Elastomer Plast., 37, 149 (2005)

[14] Lee BC, Kang DW, Polym. Korea, 28, 43 (2004)