摘要
为解决传统功能单体接枝聚烯烃弹性体(POE)增韧尼龙6 (PA6)后,共混物黏度提高、流动性极大降低的问题,以双叔丁基过氧化异丙基苯为引发剂,采用Zn(OH)_(2)、衣康酸(ITA)、共聚单体苯乙烯与POE熔融共混接枝反应,ITA中的羧基在POE熔融接枝过程中部分或全部中和,一步法制备了不同中和度的POE离聚物。通过傅里叶变换红外光谱对接枝的POE结构进行了表征,结果表明ITA接枝后的POE在1 710 cm^(-1)处出现了羰基基团的特征吸收峰,而Zn(OH)_(2)和POE在1 600~1 800 cm^(-1)处出现一个复合吸收带,对应于羧酸盐的特征吸收峰,证明了成功将离子键引入POE中。使用不同中和度POE离聚物对PA6进行增韧实验,研究了其对PA6/POE共混物力学性能和熔体流动速率的影响。结果表明:离子键的引入不仅提高了PA6/POE共混物合金的相容性,极大地提高了共混物力学性能,还能降低稳定化学键对共混物流动性下降的影响,提高共混物的熔体流动速率。
To solve the problem of increased viscosity and greatly reduced flowability of nylon 6(PA6) blends toughened by polyolefin elastomer(POE) grafted with traditional functional monomers,POE ionomers with different neutralization degrees were prepared through a one-step method.The grafting reaction was carried out by melting blending Zn(OH)_(2),itaconic acid(ITA),comonomer styrene with POE and bis-tertbutylperoxide isopropylbenzene.The carboxyl groups in itaconic acid were partially or completely neutralized during POE melt grafting process.The structure of neutralized grafted POE was characterized by Fourier transform infrared spectroscopy.The results show that ITA grafted POE exhibite a characteristic absorption peak of carbonyl groups at 1 710 cm^(-1),while a composite absorption band at 1 600-1 800 cm^(-1) corresponding to the characteristic absorption peak of carboxylates proving successful introduction of ion bonds into POE.POE ionomers with different neutralization degrees were used to toughen PA6 and their effects on the mechanical properties and melt flow rate of POE/PA6 blends were studied.The results show that the introduction of ionic bonds not only improve the compatibility of POE/PA6 blends,greatly improve the mechanical properties of the blends,but also reduce the impact of stable chemical bonds on the decrease in flowability of the blends and increase the melt flow rate of the blends.
作者
高丙轮
张宜鹏
廖辉荣
曹金波
金尚林
王惠杰
GAO Binglun;ZHANG Yipeng;LIAO Huirong;CAO Jinbo;JIN Shanglin;WANG Huijie(Beijing Huateng Jingyan Technology Co.,LTD,Beijing 100084,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2024年第1期152-155,176,共5页
Engineering Plastics Application
