西南林业大学学报
西南林業大學學報
서남임업대학학보
JOURNAL OF SOUTHWEST FORESTRY COLLEGE
2014年
4期
91-94
,共4页
脲醛改性%石粉%复合材料%聚乙烯醇缩甲醛
脲醛改性%石粉%複閤材料%聚乙烯醇縮甲醛
뇨철개성%석분%복합재료%취을희순축갑철
modified urea formaldehyde resin%tone powder%composite materials%polyvinyl formal
采用聚乙烯醇缩甲醛（PVF）对脲醛树脂进行改性，改性后同石粉进行共混制备复合材料。结果表明，在脲醛树脂中加入PVF进行改性，随PVF加入量的增加，脲醛树脂的pH、粘度变化较小，但游离醛含量的变化与PVF的加入量成正比；PVF的添加量为20％时，复合材料的弯曲强度显著提高，达到17.11 MPa，与PVF添加量为5％相比较，弯曲强度提高了6倍。扫描电镜结果表明，当PVF添加量为20％时，脲醛树脂与石粉颗粒表面结合程度最高。
採用聚乙烯醇縮甲醛（PVF）對脲醛樹脂進行改性，改性後同石粉進行共混製備複閤材料。結果錶明，在脲醛樹脂中加入PVF進行改性，隨PVF加入量的增加，脲醛樹脂的pH、粘度變化較小，但遊離醛含量的變化與PVF的加入量成正比；PVF的添加量為20％時，複閤材料的彎麯彊度顯著提高，達到17.11 MPa，與PVF添加量為5％相比較，彎麯彊度提高瞭6倍。掃描電鏡結果錶明，噹PVF添加量為20％時，脲醛樹脂與石粉顆粒錶麵結閤程度最高。
채용취을희순축갑철（PVF）대뇨철수지진행개성，개성후동석분진행공혼제비복합재료。결과표명，재뇨철수지중가입PVF진행개성，수PVF가입량적증가，뇨철수지적pH、점도변화교소，단유리철함량적변화여PVF적가입량성정비；PVF적첨가량위20％시，복합재료적만곡강도현저제고，체도17.11 MPa，여PVF첨가량위5％상비교，만곡강도제고료6배。소묘전경결과표명，당PVF첨가량위20％시，뇨철수지여석분과립표면결합정도최고。
In this study,urea-formaldehyde resin was modified by polyvinyl formal (PVF).And mix the mod-ified resin with stone powder to prepare the composite materials.The results showed that,after adding PVF to mod-ified urea-formaldehyde resin,the pH value and viscosity were no significant changes with increasing the amount of PVF,but the free formaldehyde content was proportional to the amount of PVF.With 20% addition amount of PVF,the bending strength of the composite increased significantly to 17.1 1 MPa.And compared to the 5% addi-tion amount of PVF there was a 6 times increased of bending strength.Combine to the SEM images,integration of urea-formaldehyde resin and powder particle surface was the highest degree when PVF amount was 20%.We can see that the degree of integration between the two surfaces was the main factors of the composite material’s bending strength.
