合成了一系列同时具有光固化基团（双键）和热固化基团（环氧）的聚氨酯改性丙烯酸环氧单酯。用红外光谱（FT-IR）表征了固化过程特征吸收峰的变化,测试了柔性链段对聚氨酯改性丙烯酸环氧单酯光-热混杂固化膜的凝胶率、吸水率、力学性能、体积收缩率和热性能的影响。结果表明,在相同稀释剂条件下,与丙烯酸环氧单酯光-热固化膜相比,聚氨酯改性丙烯酸环氧单酯光-热固化膜的凝胶率可达97%以上,断裂强度有所下降,但断裂伸长率由4.6%提高到19.5%,体积收缩率由6.07%下降到4.22%,光-热固化膜的热分解温度超过了240℃。
A series of polyurethane-modified epoxy monoacrylates （PMEMA） containing both UV-curable groups （C= C） and heat-curable groups （epoxy） were synthesized. The change of abmrption peaks of double bond and epoxy group were identified by FT-IR spectra during UV-heat curing process. The gel content, water absorption, mechanical, volume shrinkage and thermal characterizations of the UV cured films and UV-heat cured films were measured. Compared to the epoxy monoacrylates （EMA） UV-heat curable systems with same active diluents, the gel contents of UV-heat cured films of PMEMA systems are also beyond 97 %, and its breaking strength is decreased. Therefore, the relative elongation of W-heat cured films of PMEMA is increased from 4.6% to 19.5%, and its volume shrinkage is decreased from 6.07 % to 4.22 %. The first decomposition temperature of UV-heat chred films exceeds 240
参考文献
| [1] | Yang, ZL;Wicks, DA;Yuan, JJ;Pu, HT;Liu, YS .Newly UV-curable polyurethane coatings prepared by multifunctional thiol- and ene-terminated polyurethane aqueous dispersions: Photopolymerization properties[J].Polymer: The International Journal for the Science and Technology of Polymers,2010(7):1572-1577. |
| [2] | R.N.Kumar;Pieng Lay Po;H.D.Rozman .Studies on the synthesis of acrylamidomethyl cellulose ester and its application in UV curable surface coatings induced by free radical photoinitiator.Part 1:Acrylamidomethyl cellulose acetate[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2006(1):112-126. |
| [3] | Tzu Hsuan Chiang;T.-E. Hsieh .A study of UV-curable epoxide resins containing thermal accelerator - Tertiary amines[J].Reactive & functional polymers,2008(2):601-612. |
| [4] | 刘红波,余林梁,陈鸣才,何涛,王志霞.丙烯酸环氧单酯的合成及光-热固化性能[J].高分子材料科学与工程,2005(02):121-124. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%