摘要
聚对苯二甲酸乙二醇酯(PET)因其出色的物理化学性能在纤维、塑料和薄膜等领域得到广泛应用,但PET难以降解给环境带来了巨大压力。采用乙二醇醇解法对废弃PET瓶片进行降解,并将该醇解产物及反应性阻燃剂2-羧乙基苯基次磷酸酯通过缩聚反应制备分子内磷系阻燃共聚酯(RF-PET),并对其结构性能进行表征。结果表明:醇解产物经提纯主要为对苯二甲酸乙二醇酯(BHET)。与PET相比,RF-PET的T_g、T_m下降,结晶度减小。RF-PET有很好的阻燃性能,当磷含量为10mg/g时,极限氧指数值达33.0%。
Poly（ethylene terephthalate）（PET）has been widely used in the fields of fiber,plastic and film because of its excellent physical and chemical properties.However,PET is difficult to be degraded,which brings enormous pressure to the environment.In order to reduce environmental pollution and promote resource recycling of the waste,the waste PET bottle chips were depolymerized through glycolysis reaction using ethylene glycol.And then based on these glycolysis products and reactive flame retardant 2-carboxyethyl phenyl ester phosphinate,intramolecular flame-retardant copolyesters were prepared via condensation polymerization reaction.Their structures and properties were studied.The results showed that the purified glycolysis product was bis-hydroxyethyl terephthalate（BHET）.Compared with PET,T_g,T_mand degree of crystallinity of copolyester decreased.Moreover,the copolyester exhibited good flame retardant property with limiting oxygen index value above 33% when the phosphorous content of copolyester was about 10mg/g.
出处
《化工新型材料》
CAS
CSCD
北大核心
2016年第3期152-154,共3页
New Chemical Materials
关键词
废弃PET
醇解
阻燃
共聚
waste PET
glycolysis
flame retardant
copolymerization reaction
