摘要
利用高官能度的蓖麻油基马来酸半酯(COPERMA)来改性石油基不饱和聚酯树脂(UPR)。该蓖麻油基马来酸半酯通过醇解和马来酸酐化两步合成,并通过红外(FT-IR)、核磁(~1H-NMR)和电喷雾质谱(ESI-MS)等表征其结构和可聚合C=C的官能度。~1H-NMR结果表明,COPERMA产物上马来酸C=C的官能度较高(达2.62)。该COPERMA产物与35%(质量分数)的苯乙烯混合后,再与石油基UPR共混,制备出了部分替代的生物基不饱和聚酯树脂,并对该UPR/COPERMA树脂的物理性能、热性能和力学性能等进行了研究。物理性能数据表明,所得生物基树脂适用于液态成型工艺,且与纯UPR相比线性收缩率更低。另外,含有10%(质量分数) COPERMA树脂的UPR/COPERMA树脂的热性能和机械性能与纯UPR的相当甚至更好。当COPERMA树脂增加至20%(质量分数)时,拉伸强度和储能模量(35℃)有所下降,但并不像其他油脂基UPR那样降幅很大;其它性能如交联密度、玻璃化转变温度、拉伸和弯曲模量、冲击强度等,仍略有提高。
In this paper,oil-based unsaturated polyester resin(UPR)was modified by castor oil pentaerythritol glyceride maleates(COPERMA)with high functionality.The COPERMA was synthesized in two steps by alcoholysis and maleic anhydride.The structure and the functionality of polymerizable C=C were characterized by infrared(FT-IR),nuclear magnetic resonance(1H-NMR)and electrospray ionization mass spectrometry(ESI-MS).1H-NMR results showed that the functional degree of maleic acid C=C on COPERMA product was higher(up to2.62).The COPERMA product was mixed with35%(mass fraction)styrene and then blended with petroleum-based UPR to prepare partially substituted bio-based unsaturated polyester resin.The physical properties,thermal properties and mechanical properties of the UPR/COPERMA resin were studied.Physical properties data showed that the obtained bio-based resin was suitable for liquid forming process and had lower linear shrinkage than pure UPR.In addition,the thermal and mechanical properties of UPR/COPERMA resin containing10%(mass fraction)COPERMA resin were equivalent to or even better than those of pure UPR.When COPERMA resin increased to20%(mass fraction),the tensile strength and storage modulus(35℃)decreased,but not as much as other oil-based UPR;Other properties such as cross-linking density,glass transition temperature,tensile and bending modulus,impact strength,etc.were still slightly improved.
作者
杨高峰
Yang Gaofeng(Yulin Chemicalenergy College, Yulin 718100, Shaanxi, China)
出处
《橡塑技术与装备》
CAS
2018年第24期44-52,共9页
China Rubber/Plastics Technology and Equipment
关键词
功能化蓖麻油
不饱和聚酯树脂
生物基改性剂
高官能度
结构塑料
functionalized castor oil
unsaturated polyester resin
bio-based modifier
high functionality
structural plastic
