摘要
Abstract
The paper aims to synthetize the series of unsaturated polyester resins through changing the ra‐tio of resorcinol/formaldehyde(such as 1∶1 3. ,1∶1 5. ,1∶1 7. ,1∶2) ,and research the thermal proper‐ties of phenolic resin by TG(thermogravimetric) and DSC(differential scanning calorimeter) .The series of unsaturated polyester resins and butadiene‐vinylpyridine copylymer latex were mixed into RFL (phe‐nolic resin maceration extract) .After that ,the RFL was dried and prepared into a plastic film ,used to re‐search the mechanical properties of phenolic resin .Thus ,polyester resin with suitable monomer ratio was found I.t must have certain heat resistance and flexibility and melt at a specific temperature (325 ℃) .The results show that ,when the ratio of resorcinol/formaldehyde is 1∶2 ,phenolic resin quickly loses weight at the initial steps and has poor heat resistance .When the ratio of resorcinol/formaldehyde is 1∶1 3. ,phe‐nolic resin changes from glassy state to rubbery state ,absorbing more heat .Its decomposition tempera‐ture is lower and the decomposition goes easier ,decomposing before 300 ℃ ,which cannot meet the re‐quirement of melting at a specific temperature .When the ratio of resorcinol/formaldehyde is 1∶1 7. ,the phenolic resin has highest tensile strength、least elongation ,and moderate its hardness .Taking the above analysis of all aspects into consideration ,the comprehensive properties of phenolic resin under the ratio of resorcinol/formaldehyde 1∶1 7. is optimal .关键词
酚醛树脂/酚/醛配比/胶膜/热失重/残炭率Key words
phenolic resin/the ratio of resorcinol/formaldehyde/plastic film/thermal weight loss/carbon yield分类
轻工纺织
