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水性紫外光固化体系中光固化速度的影响因素 被引量:13
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作者 韩仕甸 金养智 王菲 《北京化工大学学报(自然科学版)》 EI CAS CSCD 2002年第1期30-32,共3页
以甲苯 2 ,4 二异氰酸酯、聚己二酸丁二醇酯二醇、二羟甲基丙酸、丙烯酸 β 羟乙酯为原料合成了光敏性树脂。经三乙胺中和后可以得到稳定的自乳化体系。考察了光引发剂种类、用量、干燥条件、中和度、中和剂种类及结构对光固化速度的... 以甲苯 2 ,4 二异氰酸酯、聚己二酸丁二醇酯二醇、二羟甲基丙酸、丙烯酸 β 羟乙酯为原料合成了光敏性树脂。经三乙胺中和后可以得到稳定的自乳化体系。考察了光引发剂种类、用量、干燥条件、中和度、中和剂种类及结构对光固化速度的影响。结果表明 ,本体系优选光引发剂Irgacure10 0 0的质量分数为 3 %时固化速度最快 ;干燥条件对光固化速度有很大的影响 ;随着中和度的提高 ,固化速度下降 ;用NaOH作为中和剂时 ,后期固化速度快于用三乙胺 ;聚合物结构对固化速度有一定的影响 ,随着PBA/DMPA和HEA/DMPA比例的提高 ,固化速度加快。 展开更多
关键词 水性光固化 固化速度 光敏性树脂 光引发剂 聚氨酯丙烯酸酯
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Self-assembly and UV-curing Property of Polymerized Lyotropic Liquid Crystal Monomer of Sodium 3,4,5-tris(ll-acryloxyundecyloxy)benzoate 被引量:1
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作者 白玉勤 郭金宝 +1 位作者 王影 魏杰 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2013年第1期95-101,I0004,共8页
A polymerized lyotropic liquid crystal monomer of sodium 3,4,5-tris(11-acryloxyundecyloxy)- benzoate was synthesized by a convenient route starting from 3,4,5-trihydroxybenzoic acid via esterification followed by et... A polymerized lyotropic liquid crystal monomer of sodium 3,4,5-tris(11-acryloxyundecyloxy)- benzoate was synthesized by a convenient route starting from 3,4,5-trihydroxybenzoic acid via esterification followed by etherification, acylation and finally neutralization. The chemi- cal structure was confirmed by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance spectral analysis. The self-organization behavior of the monomer with deionized water in methanol at room temperature was also demonstrated. The assemblies were char- acterized by polarized optical microscope and X-ray diffraction. The results show that a solution containing 80:20 of the monomer to water was found to be able to self-organize into Lamellar (La) phase and 92:8 with inverted hexagonal (H]I) phase, which was in ac- cordance with the theoretical calculation of critical packing parameter. It suggests that the concentration of the monomer was the key factor to influence assembly structure. Addi- tionally, the acrylate conversion with different photoinitiators and nanostructure retention after polymerization were investigated. The research shows that the acrylate conversion of the monomer with Darocur2959 could reach up to 78% when irradiated by 30 mW/cm2 UV light of 365 nm for 30 min characterized by Real-time FT-IR as well as the sol-gel method. Meanwhile, the La and HII phase nanostructures were both retained after polymerization. 展开更多
关键词 Polymerized lyotropic liquid crystal SELF-ASSEMBLY La phase HII phase UV-CURING
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市政管网中CIPP-UV工艺的应用研究
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作者 李昌明 《中文科技期刊数据库(文摘版)工程技术》 2021年第8期274-275,共2页
广东省广州市白云区夏茅等八村污水和供水工程中主要是针对黑臭水体整治,其中包括源头雨污分流、次支管网工程、一体化应急处理设施以及非开挖管道修复。采用非开挖修复工程施工中CIPP-UV的施工工艺,该项目已完成管径DN=500至DN=1500之... 广东省广州市白云区夏茅等八村污水和供水工程中主要是针对黑臭水体整治,其中包括源头雨污分流、次支管网工程、一体化应急处理设施以及非开挖管道修复。采用非开挖修复工程施工中CIPP-UV的施工工艺,该项目已完成管径DN=500至DN=1500之间的全部管径。本文以该非开挖修复工程为例,简单介绍紫外光固化的施工工艺、施工相关材料设备、经济性等,重点针对特殊情况下的质量保证措施及工艺完成后检测检验等内容进行研究阐述,为城市排水管线修复提供借鉴。 展开更多
关键词 非开挖修复 紫光固化 应用
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UV-curing of hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO_2 dispersion and TGA/FTIR study of cured films 被引量:11
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作者 GAO Qiong-zhi LI Hong-qiang ZENG Xing-rong 《Journal of Central South University》 SCIE EI CAS 2012年第1期63-70,共8页
UV-curable hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO2 dispersion (HBPUA-PUDA/SiO2) was prepared with isophorone diisocyanate (IPDI), hyperbranched polyester Boltorn H20 (H20), hydroxy-ethyl... UV-curable hyperbranched polyurethane acrylate-polyurethane diacrylate/SiO2 dispersion (HBPUA-PUDA/SiO2) was prepared with isophorone diisocyanate (IPDI), hyperbranched polyester Boltorn H20 (H20), hydroxy-ethyl acrylate (HEA), polyethyleneglycol (PEG-200)and nano-SiO2. The UV curing kinetics of the films was investigated by FTIR. The results show that the curing speed of the films increases with the adding of nano-SiO2 and decreases with the adding of PUDA due to the slower chain movement. The thermal stability of the HBPUA-PUDA/SiO2 films was studied by using thermogravimetric analysis coupled with Fourier transform infrared spectroscopy (TGA/FTIR). The results show that all films exhibit two degradation stages located at about 320 and 440℃ corresponding to the degradation for hard segments of urethane-acrylate and the degradation for soft segment and polyester core. In addition, the results from the analysis of TGA/FTIR also indicate that the decomposition temperature of HBPUA-PUDA/SiO2 film is 15℃ higher than that obtained for pure polymer. The degradation mechanism was proposed according to TGA/FTIR results. 展开更多
关键词 UV-CURING hyperbranched polyurethane acrylate urethane diacrylate TGA/FTIR thermal degradation
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Synthesis and properties of UV curable polyurethane acrylates based on two different hydroxyethyl acrylates 被引量:10
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作者 廖峰 曾幸荣 +2 位作者 李红强 赖学军 赵富春 《Journal of Central South University》 SCIE EI CAS 2012年第4期911-917,共7页
Two kinds of UV curable polyurethane acrylate oligomers (PUPA and PUCA) were synthesized via the addition reaction between isophorone diisocyanate (IPDI) and polyethylene glycol monoacrylate (PEA6) or polycaprol... Two kinds of UV curable polyurethane acrylate oligomers (PUPA and PUCA) were synthesized via the addition reaction between isophorone diisocyanate (IPDI) and polyethylene glycol monoacrylate (PEA6) or polycaprolactone modified hydroxyethyl acrylate (PCLA2). The structures of PUPA and PUCA were characterized by Fourier transform infrared spectroscopy (FT-IR), IH nuclear magnetic resonance (^H NMR), gel permeation chromatography (GPC) and differential scanning calorimeter (DSC), and the thermal stability and dynamic mechanical thermal properties of their cured films were measured by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA), respectively. The viscosity of the oligomers and mechanical properties of the cured films were also studied. The results show that both oligomers have narrow molecular weight distribution. The viscosity of PUPA is 2.310 Pa.s at 25 ℃, while that of PUCA is: up to 3.980 Pa-s. The UV cured PUPA and PUCA films have homogeneous phase structure, and the PUCA film shows higher glass transition temperature and storage modulus. Furthermore, the PUCA film possesses better mechanical properties than PUPA, while the latter shows better alkali resistance. 展开更多
关键词 UV curable oligomer isophorone diisocyanate polyurethane acrylate hydroxyethyl acrylate
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丙烯酸双环戊烯基酯(DCPA)自由基聚合的特点与应用 被引量:1
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作者 蒋硕健 《丙烯酸化工与应用》 2002年第2期1-12,共12页
本文就DCPA的自由基聚合,分别论述了普通自由基聚合,氧化自由基聚合、紫外光固化、后交联与接枝共聚合的特点与机制,以及它们在生产上的应用。
关键词 丙烯酸双环戊烯基酯 DCPA 特点 应用 自由基聚合 氧化自由基聚会 紫光固化 后交联接枝共聚
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