CAJ | 학술논문

采用原位聚合法，以脲醛树脂和密胺树脂预聚体为壳材、双环戊二烯(DCPD)为芯材，制备了两种DCPD微胶囊。通过扫描电子显微镜、傅里叶变换红外光谱((FTIR)对微胶囊进行了表征，并将其添加到环氧树脂(EP)中测试复合材料的力学性能。结果表明，脲醛树脂包覆DCPD微胶囊呈球形，粒径为40～80μm，壁厚为1～2μm；密胺树脂包覆DCPD微胶囊颗粒分布不规则，粒径为15～20μm，壁厚为2～5μm。两种微胶囊的FTIR谱图除了具有壳材料脲醛树脂和密胺树脂的特征峰外，在1251，3051 cm-1处均有芯材DCPD的特征峰,证明DCPD芯材已被两种壳材料成功包覆。随着微胶囊用量的增加，EP/微胶囊复合材料的拉伸强度和冲击强度均呈先增大后减小的趋势，拉伸强度和冲击强度分别在微胶囊质量分数分别为15%和10%时达到最大值，在相同条件下，加入密胺树脂包覆DCPD的复合材料的力学性能明显好于加入脲醛树脂包覆DCPD微胶囊的复合材料。
채용원위취합법，이뇨철수지화밀알수지예취체위각재、쌍배무이희(DCPD)위심재，제비료량충DCPD미효낭。통과소묘전자현미경、부리협변환홍외광보((FTIR)대미효낭진행료표정，병장기첨가도배양수지(EP)중측시복합재료적역학성능。결과표명，뇨철수지포복DCPD미효낭정구형，립경위40～80μm，벽후위1～2μm；밀알수지포복DCPD미효낭과립분포불규칙，립경위15～20μm，벽후위2～5μm。량충미효낭적FTIR보도제료구유각재료뇨철수지화밀알수지적특정봉외，재1251，3051 cm-1처균유심재DCPD적특정봉,증명DCPD심재이피량충각재료성공포복。수착미효낭용량적증가，EP/미효낭복합재료적랍신강도화충격강도균정선증대후감소적추세，랍신강도화충격강도분별재미효낭질량분수분별위15%화10%시체도최대치，재상동조건하，가입밀알수지포복DCPD적복합재료적역학성능명현호우가입뇨철수지포복DCPD미효낭적복합재료。
Two dicyclopentadiene(DCPD) microcapsules were prepared with the shell material of urea-formaldehyde resin or melamine resin and the core material of DCPD by in-situ polymerization. The microcapsules were characterized by scanning electron microscopy and fourier transform infrared spectroscopy(FTIR),the microcapsules were adding into epoxy resin and the mechanical properties were tested. Results show that urea-formaldehyde resin cladding DCPD microcapsules are spherical,particle size is 40~80 μm,wall thickness is 1~2 μm. Melamine resin cladding DCPD microcapsules disperse irregularly,particle size is 15~20 μm,wall thickness is 2~5 μm. FTIR spectrum of two microcapsules show the characteristic peak of urea-formaldehyde resin and melamine resin are existed and the characteristic peaks in 1 251 cm-1,3 051 cm-1 are existed also,which prove the core DCPD cladding with two target shell materials successfully. With an increase of microcapsules content,the tensile strength and impact strength of epoxy resin/microcapsules composites increase firstly and then decrease,the maximum values of tensile strength and impact strength reach when the mass fraction of microcapsules is 15%and 10%respectively,under the same conditions,the mechanical properties of epoxy resin/melamine resin cladding DCPD microcapsules composite are better than epoxy resin/urea-formaldehyde resin cladding DCPD microcapsules composite evidently.