Nonthermal combined ultraviolet and vacuum-ultraviolet curing process for organosilicate dielectrics

A system was developed for simultaneously measuring stress and temperature in structures in time series. The stress and temperature were measured using the photoelastic technique in the form of phase stepping and the thermographic technique, respectively. Four phase-stepped photoelastic images were captured simultaneously using beam-splitting optics. A beam splitter was used for transmitting light in the visible range while simultaneously reflecting light in the infrared range. The system was applied to ultraviolet curing resin with a step part illuminated with ultraviolet rays, and the stress and temperature in the curing process were measured. Results showed that the stress and temperature in the curing process can be measured simultaneously in time series using the system. The step part of the resin affected the distribution of the stress and temperature

Download Full-text

Paclitaxel Release from Polyether-Anhydrides Prepared with UV-Curing Process

International Journal of Polymer Science ◽

10.1155/2013/916571 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6

Author(s):

Anxin Dong ◽

Tao Zhang

Keyword(s):

Sebacic Acid ◽

Uv Curing ◽

Good Method ◽

Surface Erosion ◽

Curing Process ◽

Ultraviolet Curing ◽

Term Delivery ◽

Mass Fractions ◽

Short Time ◽

Uv Curing Process

Polyanhydrides have been used as drug delivery systems to achieve a long-term delivery due to its hydrophobicity and surface erosion degradation behavior. In order to develop a simple, economical, and rapid approach to synthesize polyanhydrides, we prepared a series of polyether-anhydride membranes composed of different mass fractions of sebacic acid, polyethylene glycol dimethacrylate, and poly(tetramethylene oxide) dimethacrylate by ultraviolet curing process. The chemical structure and thermal properties of target polyanhydrides were characterized, while the paclitaxel releases from the polymer matrix were evaluated by HPLC. The results demonstrated that the UV-curing process is a good method to synthesize the target polymers in a short time, and the paclitaxel release procedure can be controlled by changing the component in the copolymers.

Download Full-text

Oscillator Strength Measurements in the Vacuum-Ultraviolet by the Emission Method

International Astronomical Union Colloquium ◽

10.1017/s0252921100108073 ◽

1988 ◽

Vol 102 ◽

pp. 353-356

Author(s):

C. Goldbach ◽

G. Nollez

Keyword(s):

Oscillator Strength ◽

Vacuum Ultraviolet ◽

Oscillator Strengths ◽

Emission Method ◽

Absolute Scale ◽

Good Agreement

AbstractThe principles and the realization of an experiment devoted to oscillator strength measurements in the vacuum-ultraviolet by the emission method are briefly presented. The results obtained for the strong multiplets of neutral nitrogen and carbon in the 1200-2000 Å range yield an absolute scale of oscillator strengths in good agreement with the most recent calculations.

Download Full-text