摘要
用三聚氰胺、甲醛和DJ-1型增韧剂在碱性条件下制备了改性三聚氰胺甲醛树脂,将其与表面活性剂、发泡剂、固化剂充分混合搅拌,采用微波发泡炉在一定的功率下进行发泡制备三聚氰胺泡沫塑料。研究了增韧剂的用量、微波功率和发泡时间对泡沫结构和性能的影响。并用光学显微镜、TGA、驻波管对三聚氰胺泡沫塑料的泡孔结构、热学性能和声学性能进行了测试和分析。研究表明:当发泡液质量为50g时,最佳发泡功率为2kW,最佳发泡时间为60s;DJ-1型增韧剂的加入使泡沫的韧性提高,当其质量分数为10%时,泡沫的拉伸强度达到0.112MPa;泡沫的分解温度约400℃,此时的质量残留率接近60%;泡沫在中高频(≥1 000Hz)区域的吸声系数高达0.9以上。
Modified melamine-formald melamine, formaldehyde and DJ-1 flex ehyde resin（MF resin） was prepared under alkaline conditions using ibilizer. After the adding of a surfactant, a foaming agent, a curing agent to MF resin, microwave was used to foam the mixed solutions. The effects of flexibilizer amount, microwave power and microwave time on the performance and structure of MF foam were investigated, and the cell structure, thermal performance and acoustic performance of MF foam were analyzed by optical microscope, TGA and impedance experiment. Results showed that when the mass of foaming liquid was 50 g, the best microwave power and time was 2 kW and 60 s, respectively. The toughness of modified MF foam was improved, the tensile strength of MF foam was 0. 112 MPa when the mass fraction of DJ 1 flexi-bilizer was 10;. Decomposition temperature of MF foam was about 400 ℃, and the residual of mass was close to 60%. Absorption coefficient of MF foam in the medium-high frequency region （≥ 1 000 Hz） was more than 0.9.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2013年第2期156-161,共6页
Journal of Functional Polymers
关键词
三聚氰胺
泡沫塑料
微波发泡
增韧剂
吸声
melamine
foam
microwave foaming
flexibilizer
sound absorption
