共查询到19条相似文献,搜索用时 359 毫秒
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以过硫酸铵(APS)为引发剂,甲基丙烯酸甲酯 MMA 为硬单体,丙烯酸丁酯 BA 和丙烯酸乙酯(EA)为软单体,丙烯酸 AA 为功能单体,阴-非复合可聚合乳化剂(WE-9)为乳化剂,采用预乳化法合成了一种聚丙烯酸酯无皂乳液。讨论了各单体用量和乳化剂用量对其性能的影响。结果表明,当w(BA+EA)=80%、w(MMA)=15%、w(AA)=5%和w(WE-9)=1.2%时,该无皂乳液有优良的综合性能,可满足反光布生产要求。()()() 相似文献
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《有机硅材料及应用》2010,(1):58-58
西北永新化工公司的安军等人以甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸、乙烯基三甲氧基硅烷(A-171)、甲基丙烯酰氧基三甲氧基硅烷(A-174)为原料,烯丙基醚聚氧乙烯磺酸铵(SE-10N)、烯丙氧基羟丙基磺酸钠(COPS-1)为乳化剂,采用预乳化种子乳液滴加法制得了有机硅改性丙烯酸酯无皂微乳液。较佳工艺为:SE-10N、COPS-1的用量为单体质量的2%-3%. 相似文献
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采用乳液聚合法制备了丁二烯-丙烯腈-丙烯酸丁酯三元共聚物(BNBR),考察了引发剂、乳化剂及相对分子质量调节剂用量对乳液聚合反应速率的影响,并对BNBR的微观结构和动态力学性能进行了表征。结果表明,随着聚合温度的升高,BNBR的反应速率明显加快,反应诱导期缩短。引发剂及乳化剂用量的增加均可提高反应速率,而相对分子质量调节剂用量的变化对反应速率影响不大。BNBR共聚体系的表观反应活化能为27.97 kJ/mol,BNBR胶乳粒径分布均匀。BNBR的玻璃化转变温度低于丁腈橡胶(NBR),二者相差约10 ℃,BNBR在低温下的动态力学性能优于NBR。 相似文献
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高固含量聚丙烯酸酯无皂乳液的合成及表征 总被引:1,自引:0,他引:1
采用自制的可聚合乳化剂,通过预乳化半连续滴加工艺成功合成了高稳定性、固含量达50%的聚丙烯酸酯无皂乳液。通过正交实验,确定了最佳聚合反应工艺条件,表征了无皂乳液的结构、Tg、热性能、粒子形貌及粒径分布。研究结果表明,当可聚合乳化剂mB/mA为10:0、乳化剂用量为单体质量的0.4%、引发剂KPS用量为0.4%、反应温度为80℃、预乳液滴加时间为1h时,制备的无皂乳液各项性能较好。通过红外波谱(FT—IR)、差示扫描量热仪(DSC)、热重分析(TG)、透射电子显微镜(TEM)及激光粒度仪等手段分析发现,各单体之间参与了共聚反应,无皂乳液的Tg为5.19℃,胶膜的最大失重速率温度为367.96℃,乳胶粒外观呈圆球状,平均粒径为0.15μm,并且呈明显的正态分布。 相似文献
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可聚合乳化剂合成含氟丙烯酸酯无皂乳液及其性能 总被引:6,自引:2,他引:4
以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、甲基丙烯酸六氟丁酯(HFMA)等为主要原料,采用预乳化种子乳液聚合法合成了含氟丙烯酸酯无皂乳液,考察了可聚合乳化剂烯丙氧基壬基酚聚氧乙烯(10)醚硫酸铵(DNS-86)和HFMA的用量对无皂乳液的电解质稳定性和涂膜耐水性的影响。利用傅里叶红外光谱、差示量热扫描仪及热重分析对氟丙乳液涂膜进行了表征。结果表明:与传统乳液聚合得到的乳液及相应的涂膜相比,无皂乳液的耐电解质性能和涂膜的耐水性都有一定的提高,含氟单体有效地参与了聚合,涂膜的疏水性大大增强,耐热性显著提高。 相似文献
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配合使用环保可聚合阴/非离子型乳化剂LR-10和LG-20,通过种子预乳化半连续聚合工艺制备了丙烯酸酯乳液压敏胶。探讨了乳化剂的配比、用量及种类对丙烯酸酯乳液压敏胶性能的影响,并对其相关性能进行表征。实验结果表明,当m(LR-10):m(LG-20)=3:1时,所制备的丙烯酸酯乳液稳定性能最佳;GPC分析结果表明,随着复合乳化剂用量的增加,丙烯酸酯压敏胶溶胶部分的相对分子质量逐渐减少、相对分子质量分布越来越窄;当复合乳化剂的质量分数为3%时,乳胶膜的的粒径和PDI达到最小值,此时耐水性能和粘接性能最佳,压敏胶膜的水接触角为112?;FT-IR结果表明,所有的单体和可聚合乳化剂都完全参与了乳液聚合反应;与传统乳化剂体系相比,通过环保可聚合型乳化剂LR-10/LG-20所制备的乳胶膜的粘接性能最佳。 相似文献
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以十二烷基苯磺酸钠(SDBS)为阴离子型乳化剂、辛烷基苯酚聚氧乙烯醚-10(OP-10)为非离子型乳化剂、烯丙氧基壬基苯氧基丙醇聚氧乙烯醚硫酸铵(SE-10)为可聚合型乳化剂、苯乙烯(St)为硬单体、丙烯酸丁酯(BA)为软单体和丙烯酸(AA)为功能单体等,在复合乳化剂OP-10/SDBS、OP-10/SE-10作用下分别制备了纸/塑、塑/塑复膜胶。结果表明:SE-10的乳化效果优于SDBS,前者可有效提高复膜胶的初粘力和剥离强度,并可有效降低乳胶粒的平均粒径;以OP-10/SE-10作为复合乳化剂,当w(AA)=8.3%时,复膜胶的初粘力和剥离强度均达到最大值,并且其热稳定性相对较好。 相似文献
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Shuang-quan Deng Qiang Liu Xiao Bao 《Polymer-Plastics Technology and Engineering》2015,54(11):1184-1192
An oxazoline-functionalized core–shell impact modifier was synthesized between aminoethanol and acrylonitrile/butadiene/styrene high rubber powder. According to the Fourier transform infrared spectroscopy test, the nitrile groups were partially converted into oxazoline groups successfully. The oxazoline-functionalized acrylonitrile/butadiene/styrene high rubber powder was used as an impact modifier for acrylonitrile–butadiene–styrene/poly(ethylene terephthalate) blends. The differential scanning calorimeter and rheological tests demonstrated that poly(ethylene terephthalate) was partially miscible with acrylonitrile–butadiene–styrene, because the oxazoline groups of oxazoline-functionalized acrylonitrile/butadiene/styrene high rubber powder reacted with the end groups of poly(ethylene terephthalate). The results of scanning electron microscopy indicated that the morphology of acrylonitrile–butadiene–styrene/poly(ethylene terephthalate) blends with proper oxazoline-functionalized acrylonitrile/butadiene/styrene high rubber powder content was improved significantly. The best mechanical properties were achieved, When 6 wt% oxazoline-functionalized acrylonitrile/butadiene/styrene high rubber powder was added into acrylonitrile–butadiene–styrene/poly(ethylene terephthalate) blends. 相似文献
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Reinforcement of acrylonitrile butadiene rubber with waste rubber ash using ionizing radiation 下载免费PDF全文
Composites of acrylonitrile butadiene rubber with waste rubber ash (WRA) were prepared in the laboratory by a two‐roll mill. Gamma radiation at different doses (0 to 150 kGy) was applied to curing of acrylonitrile butadiene rubber composites loaded with reinforcement filler (ash powder, 5–40 parts by weight per hundred parts of rubber [phr]). WRA was characterized by Fourier‐transform infrared spectroscopy and X‐ray diffraction. Mechanical and thermal properties of prepared composites were investigated. The results show that the concentration of WRA up to 40 phr and irradiation dose up to 100 kGy improve the mechanical properties of composites. On the other hand, the thermal stability of the composites improved by adding 40 phr of WRA. J. VINYL ADDIT. TECHNOL., 23:117–124, 2017. © 2015 Society of Plastics Engineers 相似文献
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Chrome‐tanned leather waste generated in huge amount from leather industry causing environmental problem; this leather waste was used as filler in acrylonitrile butadiene rubber before treatment and after treatment with ammonia solution and sodium formate. Different formulations of acrylonitrile butadiene rubber/leather waste (untreated–treated with ammonia solution—treated with sodium formate) composites are prepared. The formed composites exhibit a considerable improvement in some of their properties such as rheometric characteristics especially with composites loaded with treated leather waste. Tensile strength, modulus at 100% elongation, hardness, and Young's modulus were improved for composite loaded with treated leather. Crosslinking density in toluene was increased by the incorporation of leather wastes treated or untreated resulting in decreases in swelling equilibrium. Distinct increase in the ageing coefficient and the thermal stability for composites loaded with both treated and untreated leather. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献
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四元共聚丙烯酸酯热熔压敏胶膜的合成研究 总被引:1,自引:0,他引:1
以丙烯酸-2-乙基己酯(2-EHA)、甲基丙烯酸甲酯(MMA)、丙烯腈(AN)和丙烯酰胺(AM)为共聚单体,采用预乳化法制备聚丙烯酸酯热熔胶,研究了单体用量配比,乳化剂用量、配比及乳化方式,引发剂用量,温度和滴加速度对反应及性能的影响。结果表明:2-EHA/MMA 1/0.6,AN 5%,AM 5%,复合乳化剂3.0%,引发剂过硫酸钾0.3%,80~85℃,反应4h,丙烯酸酯橡胶分子量在10万以上时,制得的热熔压敏胶膜综合性能良好。 相似文献
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采用松香酸皂、油酸皂和萘磺酸钠甲醛缩合物复合乳化体系,通过热法合成丁腈橡胶NBR3604,考察了影响生胶门尼黏度及硫化胶拉伸强度和扯断伸长率等的主要因素。结果表明,合成NBR3604 较适宜的配方和工艺条件为: 丁二烯56 份( 质量) ,丙烯腈44 份,软水275 份,过硫酸钾0. 5 份,三乙醇胺0. 125 份,调节剂丁0. 45 ~ 0. 60 份,乳化剂3 ~ 4 份且松香酸皂与油酸皂质量比为4 /6 或5 /5,聚合温度( 30 ± 1) ℃,单体转化率( 70 ± 2) %。在此条件下的反应过程平稳,产品各项性能符合指标要求,重复性较好。 相似文献