Photodimerization of Coumarin Functionalized Poly(alkyl Acrylate) and Poly(alkyl Methacrylate) Random Copolymers: Influence of Copolymer Composition on Photocrosslinking

REBECCA H. HUYCK; SCOTT R. TRENOR; BRIAN J. LOVE; TIMOTHY E. LONG

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Photodimerization of Coumarin Functionalized Poly(alkyl Acrylate) and Poly(alkyl Methacrylate) Random Copolymers: Influence of Copolymer Composition on Photocrosslinking

机译：香豆素官能化的聚（丙烯酸烷基酯）和聚（甲基丙烯酸烷基酯）无规共聚物的光二聚化：共聚物组成对光交联的影响

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Coumarin-containing poly(alkyl (meth)acrylates) were prepared via 70-80% esterification of hydroxy-containing acrylic copolymers, then solution cast into thin films and photocrosslinked via the dimerization of coumarin derivatives with UVA light. The coumarin-modified polymers crosslinked upon exposure and exhibited gel fractions between 74 and 99%. Coumarin dimerization efficiency increased with higher polymer mobility at the irradiation temperature. The effects of light intensity and irradiation time in photo-dimerized systems followed the Bunsen-Roscoe reciprocity law indicating that coumarin photodimerization depended only on dose. Thus, low intensities are overcome with longer times. This is an important advantage over photoinitiated free radical crosslinking which depends on irradiation intensity to the ipower.

机译：通过70-80％的含羟基丙烯酸共聚物的酯化反应制备含香豆素的聚（甲基）丙烯酸烷基酯，然后溶液流延成薄膜并通过香豆素衍生物在UVA光下的二聚作用进行光交联。香豆素改性的聚合物在暴露时交联，并且凝胶分数在74％至99％之间。在照射温度下，香豆素二聚化效率随聚合物的迁移率增加而增加。光二聚体系统中光强度和照射时间的影响遵循本生-罗斯科互惠定律，表明香豆素光二聚体仅取决于剂量。因此，较长时间克服了低强度。这是优于光引发的自由基交联的重要优点，光引发的自由基交联取决于对ipower的照射强度。

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《Journal of Macromolecular Science. Pure and Applied Chemistry》 |2008年第3期|共7页
作者
REBECCA H. HUYCK; SCOTT R. TRENOR; BRIAN J. LOVE; TIMOTHY E. LONG;
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正文语种 eng
中图分类高分子化学（高聚物）;
关键词
photocrosslink; coumarin; UV-Vis spectroscopy; glass transition; reciprocity;

机译：光交联;香豆素;紫外-可见光谱;玻璃化转变;互易;

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1. Photodimerization of Coumarin Functionalized Poly(alkyl Acrylate) and Poly(alkyl Methacrylate) Random Copolymers: Influence of Copolymer Composition on Photocrosslinking [J] . REBECCA H. HUYCK, SCOTT R. TRENOR, BRIAN J. LOVE, Journal of Macromolecular Science. Pure and Applied Chemistry . 2008,第1a3期

机译：香豆素官能化的聚（丙烯酸烷基酯）和聚（甲基丙烯酸烷基酯）无规共聚物的光二聚化：共聚物组成对光交联的影响
2. Thermal and Sonochemical Degradation Kinetics of Poly(n-butyl methacrylate-co-alkyl acrylates): Variation of Chain Strength and Stability with Copolymer Composition [J] . Rajesh Bhagat, Giridhar Madras Polymer engineering and science . 2013,第7期

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3. Hydrophobic energy estimation for giant vesicle formation by amphiphilic poly(methacrylic acid)-block-poly(alkyl methacrylate-random-mathacrylic acid) random block copolymers [J] . Eri Yoshida Colloid and polymer science . 2014,第10期

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4. SOFT, HIGH-TEMPERATURE-RESISTANT BLENDS OF POLY(ETHYLENE ALKYL ACRYLATE) COPOLYMERS AND POLYPROPYLENE [C] . David J. Walsh, Mike M. Fill Society of Plastics Engineers Annual Technical Conference . 2006

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5. Thermodynamics of Polymer Adsorption onto Nanoporous Silica and its Application in the Large Scale Purification of Poly(styrene)-block-Poly(alkyl methacrylate) Diblock Copolymers. [D] . Abdulahad, Asem Irfan. 2011

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Photodimerization of Coumarin Functionalized Poly(alkyl Acrylate) and Poly(alkyl Methacrylate) Random Copolymers: Influence of Copolymer Composition on Photocrosslinking

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