CAJ | 학술논문

用异佛尔酮二异氰酸酯(IPDI)/甲苯二异氰酸酯(TDI)、聚醚二元醇(N210)、二羟甲基丙酸(DMPA)为原料,采用两步法合成了不同硬段型聚氨酯预聚体,并用含三乙胺的去离子水中和乳化,乙二胺扩链,得TDI型和IPDI型水性聚氨酯(WPU)胶黏剂.通过红外、黏度、热重等分析方法,对不同硬段型WPU乳液、胶膜进行了结构和性能考查,对异氰酸酯基(NCO)含量进行定量、定性分析.结果表明,随着反应的进行NCO含量逐渐减少,至200min时基本达到理论值.当DMPA含量分别为3.0%(M/W)和8.0%(M/W)时,得到的TDI型和IPDI型WPU稳定、透明、耐溶剂性相对较好;此条件下的黏度分别为2000和6950mPa·s;两者的热稳定性都较好,起始分解温度分别达到350.8和295.0℃;IPDI型WPU机械强度高,拉伸强度为3.37MPa.综合比较各种性能,IPDI型WPU胶黏剂相对较佳.
용이불이동이이청산지(IPDI)/갑분이이청산지(TDI)、취미이원순(N210)、이간갑기병산(DMPA)위원료,채용량보법합성료불동경단형취안지예취체,병용함삼을알적거리자수중화유화,을이알확련,득TDI형화IPDI형수성취안지(WPU)효점제.통과홍외、점도、열중등분석방법,대불동경단형WPU유액、효막진행료결구화성능고사,대이청산지기(NCO)함량진행정량、정성분석.결과표명,수착반응적진행NCO함량축점감소,지200min시기본체도이론치.당DMPA함량분별위3.0%(M/W)화8.0%(M/W)시,득도적TDI형화IPDI형WPU은정、투명、내용제성상대교호;차조건하적점도분별위2000화6950mPa·s;량자적열은정성도교호,기시분해온도분별체도350.8화295.0℃;IPDI형WPU궤계강도고,랍신강도위3.37MPa.종합비교각충성능,IPDI형WPU효점제상대교가.
Different hard segment waterborne polyurethane prepolymen are synthesized in two steps from isophomne diisocyanate(IPDI)/toluene diisocyanate (TDI),polyester polyol(N210),dimethlolpropionic acid(DMPA),using deionized water with triethylamine to neutralize and emulsify,then being chained with ethylene diamine(EDA),to obtain WPU adhesives from TDI and IPDI.The structure and properties of different hard segment WPU emulsions and films are investigated by FTIR,Viscosity,Thermo Gravimetric(TG)methods.The NCO contents are analyzed by the quantitative and qualitative analysis methods.It is shown that with the reaction in process,the NCO group content is gradually reduced,and it takes at least 200min to reach the theoretical value.WPU adhesives from TDI and IPDI emulsions are more stable,transparent,and the solvent resistance is better when the contents of DMPA are 3.0%(W/W)and 8.0%(W/W),respectively;Under these conditions,the viscosity can reach 2000mPa·s and 6950mPa·s，respectively.Both WPU films from TDI and IPDI have good thermal stability.and the thermal decomposition temperatures are 350.8℃and 295.0℃,respectively.WPU from IPDI has higher mechanical strength.with tensile strength of 3.37MPa.The overall performance of WPU adhesive prepared by IPDI is better than that by TDI.