CAJ | 학술논문

采用预聚体分散法,以甲苯2,4-二异氰酸酯(TDI)、聚醚(PPG)和二羟甲基丙酸(DMPA)为主要原料,用三乙胺(TEA)为中和剂合成了阴离子水性聚氨酯(PU);以丙烯酸丁酯(BA)为原料,采用乳液聚合的方法制备聚丙烯酸酯乳液(PA),并与PU共混形成(PU+PA)混合乳液.在高压釜中以混合乳液为种子进行氯乙烯(vC)原位共聚,制备了(PU+PA)/PVC复合乳液树脂.通过电子万能试验机、冲击试验机、扫描电子显微镜(SEM)、TA-2000热分析仪和维卡软化点温度测定仪等手段对(PU+PA)/PVC复合树脂进行了测试和表征.结果表明:耐热性较好的PA的加入,不但提高了材料的耐热性能,还能有效地改善复合树脂的抗缺口冲击强度.当PA/PU为4/6,聚醚分子量为3000时,(PU+PA)/PVC复合树脂的缺口冲击强度最大.
채용예취체분산법,이갑분2,4-이이청산지(TDI)、취미(PPG)화이간갑기병산(DMPA)위주요원료,용삼을알(TEA)위중화제합성료음리자수성취안지(PU);이병희산정지(BA)위원료,채용유액취합적방법제비취병희산지유액(PA),병여PU공혼형성(PU+PA)혼합유액.재고압부중이혼합유액위충자진행록을희(vC)원위공취,제비료(PU+PA)/PVC복합유액수지.통과전자만능시험궤、충격시험궤、소묘전자현미경(SEM)、TA-2000열분석의화유잡연화점온도측정의등수단대(PU+PA)/PVC복합수지진행료측시화표정.결과표명:내열성교호적PA적가입,불단제고료재료적내열성능,환능유효지개선복합수지적항결구충격강도.당PA/PU위4/6,취미분자량위3000시,(PU+PA)/PVC복합수지적결구충격강도최대.
Anionic water borne polyurethane (PU) emulsion was prepared with toluene diisocyanate (TDI),polypropylene glycol (PPG) and dimethylol propionic acid (DMPA) by prepolymer dispersing process using triethylamine as neutralizer.Polyacrylate(PA)emulsion was prepared from butyl acrylate (BA) by emulsion polymerization technique.Then it was blended with PU emulsion to prepare polyurethane-polyacrylate (PU+PA) hybrid emulsion.In the presence of the (PU+PA) hybrid emulsion,the (PU+PA)/PVC composite resins were obtained by in-situ emulsion copolymerization in an autoclave.The properties of the (PU+PA)/PVC composite resins were determined via electronic universal tesring machine,impact tester,TA-2000-type thermal analyzer and Vicat needle apparatus,respectively.The fractured morphology of the composite resin materials was characterized by scanning electron microscopy.The study results showed that the heat resistance and impact strength of the composite resins were improved when the PA with excellent heat stability was added in.When the proportion of PA and PU prepared from 3000 molecular weight of polypropylene glycol was 4/6,the notched impact strength of the (PU+PA)/PVC composite resin was the greatest.