Radiation-induced graft copolymerization of 2-hydroxyethyl methacrylate onto poly(?-methyl-L-glutamate) membrane in ethanol solution
3
Citation
0
Reference
10
Related Paper
Citation Trend
Abstract:
The radiation-induced graft copolymerization of 2-hydroxyethyl methacrylate (HEMA) onto poly(γ-methyl-L-glutamate) membranes was investigated in ethanol. The effects of dose, dose rate, concentration of HEMA, and temperature on the degree of grafting were studied. The initial rate of grafting copolymerization shows the following functional relationship equation: dG0/dt = k[M]0D˙0.56. The average values of the apparent constants at 27 and 37°C for the initial rates of grafting are k1 = 51 and k2 = 91 G%h−0.44 kGy−0.56 mol−1 L, respectively. The apparent activation energy of grafting copolymerization is E = 10.7 kcal/mol. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1575–1580, 1998Keywords:
2-Hydroxyethyl Methacrylate
Abstract Mechanical properties of copolymers of 2-hydroxyethyl methacrylate with methyl methacrylate, ethyl methacrylate, and n-butyl methacrylate have been investigated using an Instron tensile tester. It was observed that the overall mechanical properties decrease as the ester alkyl group of alkyl methacrylate becomes bulkier. Biocompatibility of the copolymers was also investigated by implanting them subcutaneously in rats.
2-Hydroxyethyl Methacrylate
Biocompatibility
Cite
Citations (16)
2-Hydroxyethyl Methacrylate
Cite
Citations (0)
2-Hydroxyethyl Methacrylate
Biocompatibility
Inert
Cite
Citations (9)
Abstract The goal was to electrospin 2-hydroxyethyl methacrylate — based biocompatible polymers and prepare submicron fibres (nanofibers) for biomedicinal applications. Syntheses of poly(2-hydroxyethyl methacrylate) (HEMA) and its copolymer with 2-ethoxyethyl methacrylate (EOEMA), and their characterization by viscometry and molecular weight are described. Their relation to electrospinning is discussed. Electrospinning of HEMA homopolymer from water-ethanol is successful for molecular weights 6.31 × 105 and 1.80 × 106 g/mol. Electrospinning of HEMA/EOEMA copolymers is feasible from ethanol.
2-Hydroxyethyl Methacrylate
Electrospinning
Cite
Citations (12)
2-Hydroxyethyl Methacrylate
Cite
Citations (16)
2-Hydroxyethyl Methacrylate
Ethylene glycol dimethacrylate
Triethylene glycol
Cite
Citations (6)
Isocyanato urethane methacrylates were synthesized from five diisocyanates and hydroxyethyl methacrylate. They may be homopolymerized or copolymerized with other methacrylates by the usual free radical methods of initiation and have potential as adhesion-promoting agents for dentin.
2-Hydroxyethyl Methacrylate
Cite
Citations (24)
하이드로젤은 고도로 수화된 고분자 네트워크로서, 외부 자극에 따라 다른 팽윤 거동을 보이기 때문에 센서나 액츄에이터로 이용될 수 있다. 본 논문에서 우리는 poly(2-hydroxyethyl methacrylate)(PHEMA) 기반 공중합체의 pH 의존 팽윤 거동 제어 연구를 수행하였다. 먼저, 공중합체가 아닌 순수한 PHEMA는 매우 약한 pH 의존 팽윤 거동을 보임을 확인하였다. 이 PHEMA에 카복실기를 갖는 acrylic acid를 공중합할 경우, pH가 증가할수록 팽윤비가 크게 증가하였다. 이에 반해, PHEMA에 다이메틸아민기를 갖는 (2-dimethylamino)ethyl methacrylate)를 공중합할 경우, pH가 증가할수록 팽윤비가 감소하는 거동을 보였다. 이와 같이, 작용기를 적절하게 선택하여 PHEMA 고분자의 pH 의존 팽윤 거동 특성을 제어할 수 있다. 또한 더 큰 pH 의존 팽윤 거동 특성을 얻기 위해, PHEMA 중합시 개시제, 가교제 조성이 팽윤 거동에 미치는 영향에 대해 관찰하였다. 본 연구는 하이드로젤을 기반으로 한 센서나 액츄에이터와 같은 응용 분야에 유용한 정보를 제공할 수 있을 것이다.
2-Hydroxyethyl Methacrylate
Acrylic acid
Cite
Citations (2)
Abstract The 2‐hydroxyethyl methacrylate (HEMA)/ethyl methacrylate (EMA) graft copolymer system has been found to be a useful model for investigating blood/polymer interactions. Studies of the structure of both HEMA and EMA radiation‐grafted regions were conducted using extraction methods and transmission electron microscopy of selectively stained HEMA grafts. The effect of the extraction procedure on the surface topography of HEMA‐ or EMA‐grafted films was studied by means of scanning electron microscopy. The existence of internal cells in the bulk of the HEMA network was demonstrated, and their osmotic nature was investigated. As grafting proceeds, the HEMA network becomes increasingly porous. The extraction studies carried out on EMA grafted showed that with this system an increasingly dense structure is obtained as grafting proceeds.
2-Hydroxyethyl Methacrylate
Biomaterial
Cite
Citations (23)