Rheological Behavior during Phase Separation Induced by UV Curing

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概要

• 論文の詳細を見る

• The rheological changes during UV curing are examined for solutions of UV-reactive acrylic prepolymer and alkyd resin. To measure the dynamic viscoelasticity in the entire process of UV curing by a single run, a rheological program is developed, by which the storage modulus can be detected in the range of 10^0-10^8 Pa under linear conditions. The solutions containing alkyd resin at concentrations of 10-30wt% show phase separation in the course of curing. The storage modulus of such systems rapidly increases at first, goes through a maximum and then decreasingly approaches the equilibrium value. The microscopic observation of cured films clearly indicates that the droplets generated by phase separation can grow and migrate in the three-dimensional network. The growth of droplets accompanies the rupture of continuous network in a narrow range. The delicate balance between the local rupture of network by phase separation and formation of crosslinks by polymerization controls the appearance of peak in the time-dependent curve of storage modulus.

• 社団法人日本材料学会の論文
• 2002-03-15

著者

• Otsubo Y

  Chiba Univ. Chiba Jpn

• Otsubo Yasufumi

  Department Of Urban Environment System Chiba University

• NAM Su-Yong

  Division of Image and Information, College of Engineering, Pukyong National University

• SAKAI Mikihiro

  EKO Instruments Trading, Co.

• Nam Su-yong

  Division Of Image And Information College Of Engineering Pukyong National University

• Sakai Mikihiro

  Eko Instruments Trading Co.

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• Rheological Behavior during Phase Separation Induced by UV Curing
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• Rheology and Firing Properties of Phosphor Pastes for CRT Displays
• ポリエチレングルコール分散系のエレクトロレオロジー

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