• Bulletin of the Korean Chemical Society
• /
• 제17권4호
• /
• pp.376-379
• /
• 1996

The bulk photopolymerization of methacrylic acid (MA) with phenylsilane was performed to produce poly(MA)s containing phenylsilyl moiety presumably as an end group. It was found that while the polymerization yields and intrinsic viscosities decreased, the TGA residue yields and the relative intensities of SiH IR stretching bands increased with increasing molar ratio of phenylsilane over MA. The phenylsilane seemed to significantly influence on the photopolymerization as both chain initiation and chain transfer agents.

• Bulletin of the Korean Chemical Society
• /
• 제16권4호
• /
• pp.360-363
• /
• 1995

The photopolymerization of methyl methacrylate(MMA) with phenylsilane wasperformed. The molecular weights of the poly(MMA) containing SiH moieties were increased with augment of molar ratio of PhSiH3 over MMA by cross-linking via hydrosilation at the expense of isolated yield. Phenylsilane apparently influenced on the photopolymerization as a chain transfer agent and solvent.

• 한국안광학회지
• /
• 제6권2호
• /
• pp.145-148
• /
• 2001

Phenylsilane들과 2-Hydroxyethylmethacrylate(HEMA)의 광중합은 말단기에 phenylsilyl기를 포함하고 있는 poly(HEMA)s를 생성시킴으로써 열중합과 같은 결과를 보였다. 중합반응 동안에 실란의 몰비율이 증가함에 따라 중합수율과 고유점도는 감소하였으며, TGA 잔여수율과 Si-H IR 신축띠의 상대적 세기는 증가하는 경향을 보였다. phenylsilanne은 HEMA와의 광중합 반응에서 연쇄개시제와 전달물질로 중요한 영향을 주었다.

• Bulletin of the Korean Chemical Society
• /
• 제17권4호
• /
• pp.373-376
• /
• 1996

The bulk thermal and photopolymerization of methyl methacrylate(MMA) with phenylsilane were performed to produce poly(MMA)s containing phenylsilyl moiety presumably as an end group. It was found for both thermal and photopolymerization that while the polymerization yields and polymer molecular weights decreased as the relative phenylsilane concentration increases, the TGA residue yields and the relative intensities of SiH IR stretching bands increased with increasing molar ratio of phenylsilane over MMA. The polymerization yield, molecular weight, and TGA residue yield for the thermal polymerization were higher than those for the photopolymerization. Thus, the phenylsilane seemed to significantly influence on the polymerization as both chain initiation and chain transfer agents. However, an appreciable silane effect was not observed on the thermal and photopolymerization of 4-vinylpyridine, acrylonitrile, styrene, and vinyltrimethoxysilane.

• Bulletin of the Korean Chemical Society
• /
• 제16권11호
• /
• pp.1056-1059
• /
• 1995

The bulk photopolymerization of methyl methacrylate (MMA) with primary arylsilane (e.g., phenylsilane) and various primary alkylsilanes (e.g., benzylsilane, 3-phenoxyphenyl-1-silabutane, 3-naphthyl-1-silabutane, and 3-chlorophenyl-1-silabutane) was performed to produce poly(MMA)s containing the corresponding silyl moiety as an end group. It was found for the phenylsilane that while the polymerization yields increased and then decreased with a turning point at the molar ratio of MMA:silane=10:1 as the relative silane concentration increases, the polymer molecular weights decreased, and the TGA residue yields and the relative intensities of SiH IR stretching bands increased with increment of molar ratio of silane over MMA. The photopolymerization yield of MMA with the arylsilane was found to be higher than those with the alkylsilanes and without the silanes. Thus, the silanes seemed to significantly influence on the photopolymerization as both chain initiation and chain transfer agents.

• 한국안광학회지
• /
• 제5권2호
• /
• pp.87-90
• /
• 2000

Poly(HEMA)는 소프트 콘택트렌즈의 재료로써 널리 사용되어 왔다. $phSiH_3$, $phMeSiH_2$, $ph2SiH_2$와 같은 다양한 hydrosilane들과 hydroxyethyl methacrylate(HEMA)와의 열중합은 Phenylsilyl 말단기를 포함하는 poly(HEMA)를 생성시켰다. 열중합 반응 동안에는 Phenylsilane의 농도가 증가함에 따라 고분자의 분자량과 고분자 수득률이 감소됨을 보였으며 광중합 반응에서 보다 중합 수득률, 고분자의 분자량, TGA 잔여 수율 등이 더 높았다.

• 대한화학회지
• /
• 제40권5호
• /
• pp.347-356
• /
• 1996

트리플산에 의한 phenylsilane 의 선태적 분해반응에서는 silyltriflate ester 결합을 형성하였다. 1 혹은 2당량배의 트리플산에 의한 $Ph_3SiH$과 carbosilane 고분자$(Ph_2SiCH_2CH_2CH_2)n$의 Ph기 치환반응에서는 1 혹은 2치환 silyltriflate ester 결합을 형성하였으며 이들과 allylmagnesium bromide와의 반응에 의해 이에 상응되는 화합물을 높은 수율로 얻었다. Carbosilane 고분자의 나무가지꼴 실란거대분자를 allylation 과 hydrosilation법에 의해 제3세대(G3)까지 합성하였다.

• 대한화학회지
• /
• 제48권2호
• /
• pp.220-224
• /
• 2004

• Bulletin of the Korean Chemical Society
• /
• 제22권12호
• /
• pp.1337-1340
• /
• 2001

The bulk photopolymerization of methyl methacrylate (MMA) with para-substituted phenylsilanes such as F-C6H4SiH3 (1), H3C-C6H4SiH3 (2), and H3CO-C6H4SiH3 (3) was performed to produce poly(MMA)s containing the respective silyl moiety as an end group. For all the hydrosilanes, the polymerization yields and the polymer molecular weights decreased, whereas the TGA residue yields and the relative intensities of Si-H IR stretching bands increased as the relative silane concentration over MMA increased. The polymerization yields and polymer molecular weights of MMA with 1-3 increased in the order of 3 < 1 < 2. These hydrosilanes influence significantly upon the photopolymerization of MMA as both chain-initiation and chain-transfer agents.

• 통합자연과학논문집
• /
• 제2권1호
• /
• pp.18-23
• /
• 2009

This minireview provides the chosen examples of our recent discoveries in the polymerization of hydrosilanes, dihydrosilole, lactones, and vinyl derivatives using various catalysts. Hydrosilanes and lactones copolymerize to give poly(lactone-co-silane)s with $Cp_2MCl_2$/Red-Al (M = Ti, Zr, Hf) catalyst. Hydrosilanes (including dihydrosilole) reduce noble metal complexes (e.g., $AgNO_3$, $Ag_2SO_4$, $HAuCl_4$, $H_2PtCl_6$) to give nanoparticles along with silicon polymers such as polysilanes, polysilole, polysiloxanes (and silicas) depending on the reaction conditions. Interestingly, phenylsilane dehydrocoupled to polyphenylsilane in the inert nitrogen atmosphere while phenylsilane dehydrocoupled to silica in the ambient air atmosphere. $Cp_2M/CX_4$ (M = Fe, Co, Ni; X = Cl, Br, I) combination initiate the polymerization of vinyl monomers. In the photopolymerization of vinyl monomers using $Cp_2M/CCl_4$ (M = Fe, Co, Ni), the photopolymerization of MMA initiated by $Cp_2M/CCl_4$ (M = Fe, Co, Ni) shows while the polymerization yield decreases in the order $Cp_2Fe$ > $Cp_2Ni$ > $Cp_2Co$, the molecular weight decreases in the order $Cp_2Co$ > $Cp_2Ni$ > $Cp_2Fe$. For the photohomopolymerization and photocopolymerization of MA and AA, the similar trends were observed. The photopolymerizations are not living. Many exciting possibilities remain to be examined and some of them are demonstrated in the body of the minireview.