摘要
利用缩聚反应后期桐油与双环戊二烯不饱和聚酯(DCPD-UPR)主链上不饱和双键的Diels-Alder(D-A)反应合成了桐油改性DCPD-UPR,研究了各种原料用量对桐油改性DCPD-UPR其浇注体力学性能的影响。结果表明:当顺酐与苯酐的物质的量比为2∶1～3∶1,双环戊二烯与顺酐物质的量比为0.6～0.8∶1,1,2-丙二醇与二甘醇物质的量比2∶1,缩聚反应后期加入10%(质量分数)桐油,苯乙烯质量分数为35%～40%时,获得的桐油改性DCPD-UPR粘度适中,浇注体的断裂伸长率提高了78.2%,冲击强度提高了82.0%。
The tung oil modified dicyclopentadiene unsaturated polyester resin（DCPD-UPR） was synthesized by the Diels-Alder（D-A） reaction between tung oil and the double bond of DCPD-UPR main chain in the later stage of polycondensation.The effects of various raw material dosages on the mechanical properties of UPRs and their castings were investigated.The results showed that the tung oil modified DCPD-UPR with moderate viscosity was obtained as the conditions as followed： molar ratio of maleic anhydride to phthalic anhydride,DCPD to maleic anhydride and 1,2-propanediol to diethylene glycol 2-3∶ 1,0.6-0.8∶ 1 and 2∶ 1,respectively,adding 10% tung oil in the late polycondensation and mass fraction of styrene 35%~40%.The elongation at break and impact strength of the castings were increased by 78.2% and 82.0%,respectively.
出处
《热固性树脂》
CAS
CSCD
北大核心
2013年第1期11-14,共4页
Thermosetting Resin
基金
中国林业科学研究院林业新技术研究所所长基金(CAF-INT2011C02)资助
关键词
桐油
双环戊二烯
不饱和树脂
合成
浇注体
力学性能
tung oil
dicyclopentadiene
unsaturated polyester resin
synthesis
casting
mechanical property
