三聚氰胺甲醛树脂改性的P(VAc-MMA-AA)乳液

报道了 Ｐ Ｖ Ａｃ 乳液中保护胶体的改性, Ｐ（ Ｖ Ａｃ － Ｍ Ｍ Ａ－ Ａ Ａ） 乳液及三聚氰胺甲醛树脂的合成及共混。考察了乳液粘度、稳定性及其成膜耐水性等。结果表明,所得改性 Ｐ（ Ｖ Ａｃ － Ｍ Ｍ Ａ － Ａ Ａ） 共混乳液的耐水性、耐热性、耐寒性及粘结强度较 Ｐ Ｖ Ａｃ 均聚物乳液均有明显改善。     

PVA—PVC乳液共混纺丝原液的机械稳定性

为了获得性能良好的丝束，对ＰＶＡ－ＰＶＣ乳液共混纺丝原液在纺丝时经计量泵的机械稳定性问题进行研究。     

多孔性共聚物粒子乳液的制备

首先合成了苯乙烯（Ｓｔ）－甲基丙烯酸甲酯（ＭＭＡ）共聚物种子乳液，然后进行Ｓｔ．ＭＭＡ和甲基丙烯酸（ＭＡＡ）的无皂种子乳液聚合，制得Ｐ（Ｓｔ－ＭＭＡ－ＭＡＡ）乳液，将该乳液在９０℃下依次用碱和酸处理３ｈ经透射电子显微镜表征，证实所得共聚物乳胶粒具有多孔结构。     

EVA与CPE协同增容增韧HDPE／PS／Talc研究

用正交设计试验法研究ＥＶＡ与ＣＰＥ对ＨＤＰＥ／ＰＳ共混物的改性效果，发现ＥＶＡ与ＣＰＥ对ＨＤＰＥ／ＰＳ具有较明显的协同增增韧作用。当ＨＤＰＥ／ＰＳ／ＥＶＡ／ＣＰＥ配比为１００／１０／２０／１０时，共混物综合性能最佳。在此基础上又进行了Ｔａｌｃ填充ＨＤＰＥ／ＰＳ／ＥＶＡ／ＣＰＥ的应用性考察。结果表明：由Ｔａｌｃ与上述多元共混型增容增韧改性物的怕复合塑料的韧性、延伸性和加工流动性等明显优于同类未改性复     

高透明耐冲击聚氯乙烯(HTI-PVC)接枝用乳液的制备

用苯乙烯（Ｓｔ）和丙烯酸丁酯（ＢＡ）制备的乳液，通过控制乳液粒子大小及采用乳液粒子聚集技术，将乳液接枝氯乙烯（ＶＣ）单体，制备出冲击性能和透光性两者兼优的ＨＴＩ－ＰＶＣ。讨论了乳化剂、引发剂、交联剂对乳液粒子结构和形态及接枝聚合物性能的影响。     

甲基丙烯酸酯／醋酸乙烯酯共聚物的原油降凝降粘效果研究

用不同组成、不同分子量的聚甲基丙烯酸正十八酯／醋酸乙烯酯Ｐ（ｎ－ＯＭＡ－ＣＯ－ＶＡ）共聚物样品对新疆混合原油、马岭原油和大庆原油进行降凝降粘试验。结果表明，分子量约为１×１０５，ＶＡ含量为３３．３％和１４％的Ｐ（ｎ－ＯＭＡ－ＣＯ－ＶＡ），加５０μｇ／ｇ使新疆混合原油降凝２０．５℃；分子量约１×１０５，ＶＡ（醋酸乙烯酯）含量为１８．４％～１４％之间的Ｐ（ｎ－ＯＭＡ－ＣＯ－ＶＡ），加２００μｇ／ｇ使马岭原油降凝２４℃。两种原油的粘度都有显著的下降。而大庆原油随着Ｐ（ｎ－ＯＭＡ－ＣＯ－ＶＡ）分子量增加，降凝效果变好。     

阳离子共聚物CAM－co－DM的合成及絮凝和防膨性能

通过丙烯酰（ＡＭ）的Ｍａｎｎｉｃｈ反应制备的含叔胺基改性丙烯酰胺胺盐酸盐（ＣＡＭ）同二甲基二烯丙基氯化铵（ＤＭ）共聚，得到了共聚物ＣＡＭ－ｃｏ－ＤＭ，其絮凝和防膨性能优于相同阳离子度的共聚物ＡＭ－ｃｏ－ＤＭ。     

LLDPE熔融接枝马来酸酐及其在PC／ABS共混中的应用

对ＬＬＤＰＥ熔融接枝ＭＡ进行了研究，并检验了此共聚物在ＰＣ／ＡＢＳ共混中的增容改性作用。ＬＬＤＰＥ、ＭＡ和ＤＣＰ在熔融状态下经挤出机挤出，可得到ＬＬＤＰＥ－ｇ－ＭＡ共聚物。红外光谱分析表明，提高ＤＣＰ和ＭＡ的浓度有利于提高共聚物接枝度。将该共聚物加入ＰＣ／ＡＢＳ共混物中，可明显改善共混物的耐热性，使ＡＢＳ的分布趋于均匀，改善了ＰＣ与ＡＢＳ之间的相容性，增韧作用明显，冲击强度、抗张强度和伸长率均显著提高，弯曲强度略有下降。此合金物理机械性能优良，可望成为一种具有重要实际意义的塑料合金。     

丙烷部分氧化制取丙烯醛Ⅰ.多组份氧化物催化剂的研究

对丙烷氧化制取丙烯醛的多组份氧化物催化剂进行了制备研究和ＴＰＲ、ＸＲＤ表征。结果表明Ｂｉ－Ｖ－Ｍｏ－Ｏ与Ｂｉ－Ｖ－Ｗ－Ｏ催化剂对丙烷氧化制取丙烯醛具有较高的活性与选择性，Ａｇ＋是优良助剂。添加Ａｇ＋调变的Ａｇ－Ｂｉ－Ｖ－Ｍｏ－Ｏ催化剂在４９０℃、０．００４ＭＰａ、３０００ｍｌ／（ｇｃａｔｈ）条件下，丙烷转化率为４６．９％，丙烯醛选择性为５２．８％。ＴＰＲ和ＸＲＤ研究表明，有优良催化性能的Ｂｉ－Ｖ－Ｍｏ－Ｏ和Ａｇ－Ｂｉ－Ｖ－Ｍｏ－Ｏ催化剂体系中具有白钨矿（ｓｃｈｅｅｌｉｔｅ）型的结构     

P(St-MAH)的合成及其对PC/PS共混体系相容性的影响

合成了不同马来酸酐含量的苯乙烯与马来酸酐共聚物Ｐ（Ｓｔ－ＭＡＨ），添加到ＰＣ／ＰＳ共混体系中，可增加二者的相容性。在共混体系中，ＰＣ相Ｔｇ变化不大，而ＰＳ相Ｔｇ升高，升高的幅度与共聚物中ＭＡＨ含量有关，含ＭＡＨ１２．８％时效果最好；也与ＰＣ／ＰＳ共混体系中ＰＳ含量有关，ＰＳ较少时升幅较大。     

有机硅改性丙烯酸树脂乳液的制备及应用性能

采用乳液聚合方法,以磺基琥珀酸单酯钠盐(A-501)和脂肪醇聚氧乙烯醚(AEO-9)为复合乳化剂,制备了有机硅改性丙烯酸树脂乳液。考察了乳液乳胶粒粒径分布及Zeta电位,并采用红外光谱和透射电镜对其结构进行了表征。硅丙乳液的最佳工艺条件为:m(BA)∶m(ST)∶m(AA)∶m(HPA)=34∶21∶2∶3,w(有机硅)=10%,m(A-501)∶m(AEO-9)=2∶1,w(A-501+AEO-9)=3%,乳液凝胶率3.33%,胶膜柔软不黏手,胶膜吸水率3.65%。     

乳化SBS改性沥青和SBR改性乳化沥青对比试验

SBR改性乳化沥青容易生产,低温性能好,是目前公路工程中常用的改性乳化沥青；而乳化SBS改性沥青的高温性能好,更适应炎热地区使用。在实验基础上,对比两种乳化沥青的生产工艺、性能及造价,乳化SBS改性沥青具有良好的推广应用前景。     

环保抗冻型聚乙酸乙烯酯乳液胶黏剂的合成与性能

实验以聚乙烯醇(PVA)1788和PVA1799作复合保护胶体,二烷基硫酸钠(SDS)和壬基酚聚氧乙烯醚(OP-10)作复合乳化剂,乙二醛为交联剂,过硫酸钾(KPS)为引发剂,反应温度为(75±2)℃,以种子半连续乳液聚合工艺.引入不饱和羧酸单体,合成改性的聚乙酸乙烯酯(PVAc)乳液。采用单体滴加工艺,考察了配方中丙烯酸丁酯(BA)、不饱和羧酸单体甲基丙烯酸(MAA)、保护胶体聚乙烯醇(PVA)以及乳化剂对乳液性能和聚合过程的影响;实验结果表明,BA用量(相对于配方中单体总质量)1%～9%、w(MAA)=4.5%到改性PVAc乳液中,改性PVAc乳液冻融循环6次,-18℃冻结6个月融化后可恢复良好流动性,是一种抗冻性及贮存稳定性优良的乳液胶黏剂。     

河南省道路用改性乳化沥青技术要求(建议稿)的提出

改性乳化石油沥青技术要求有很强的地域特点，通过对美国改性乳化沥青技术标准和河南省的气候调查分析，提出了河南省道路用改性乳化沥青技术要求（建议稿）。     

Rheological properties of bitumen emulsion modified with NBR latex

NBR, a copolymer of butadiene and acrylonitrile, is used for applications requiring resistance to petroleum oils and gasoline. So using NBR as a modifier in bitumen, resistance against the destruction of gasoline and diesel oil will be increased. In this work, rheological properties of bitumen emulsion modified with NBR latex have been investigated. Bitumen emulsion samples were provided with various percent of NBR latex, and the residues of normal and modified bitumen emulsion were tested using ordinary and dynamic shear rheometer (DSR) methods. Using NBR latex as a modifier caused an increase in the softening point of bitumen emulsion residue as well as a decrease in the penetration grade and temperature sensitivity. At the end, by analyzing temperature sweep curves of DSR, it was found that modified bitumen emulsion residues with more than 6% NBR in residue have higher rutting potential temperatures.     

Modifying asphalt emulsion with different types of polymers for surface treatment applications

Asphalt emulsion produced from local asphalt 60/70 (Suez Co.) was modified with different types of polymers such as epoxy resin, latex styrene butadiene styrene (SBS), poly vinyl acetate (PVA), and with a mixture of two or more types of above mentioned polymers to produce a modified asphalt emulsion with high performance. This paper describes the method and technique for preparing asphalt emulsion as well as the tests, and evaluates several aspects concerning the prepared emulsion such as performance of evaporation residues, fuel and acid resistance, rheological properties, and durability. The results obtained revealed that all the modified asphalt emulsions gave better performance as compared with unmodified emulsion. Asphalt emulsion modified with a mixture of epoxy resin, latex SBR, and PVA showed the best road performance in terms of fuel and acid resistance. It was observed that the weight loss for unmodified binder, residue after evaporation of water, after immersion in kerosene for 120 min is 90% of its initial weight, while the binder improved with a mixture of SBS latex, epoxy resin, and PVA showed a weight loss of ?16% and 9% of its initial weight. Also, the admixture gives high acid resistance (weight loss ～ 9%) after immersing in 5% HCl. The dynamic viscosity test showed that asphalt emulsion modified with a mixture of SBS latex, epoxy resin, and PVA has the highest viscosity value which is a promising indication about the validity of its use for pavement in different applications.     

胶乳改性乳化沥青性能试验研究

实验室内通过添加不能掺量的SBS胶乳和SBR胶乳分别制成改性乳化沥青。分别考察了筛上剩余量、恩格拉粘度、储存稳定性以及残留物的软化点、延度等几项主要指标随胶乳掺量变化的情况。SBS胶乳和SBR胶乳在对乳化沥青高低温性能的改善上各有侧重,建议在对高温性能要求较为严苛的地区使用SBS胶乳改性乳化沥青,而在对低温性能要求较为严苛的地区使用SBR胶乳改性乳化沥青。     

The rheological properties of a bitumen emulsion modified with two types of SBR latex

Bitumen emulsions have recently been taken as one of the most frequently used binders for asphalt surface treatments (AST). Making use of modified bitumen emulsion is necessary to improve AST. Styrene butadiene rubber (SBR) is one of the most commonly used modifiers. The present research study tested the residue of normal and modified bitumen emulsion with different percentages of SBR and X-SBR using ordinary and dynamic shear rheometer methods. The findings revealed that increasing latex SBR led to increasing softening point and needle penetration, so that temperature sensitivity of bitumen residue is reduced. The stiffness of modified bitumen emulsion residue improved significantly by increasing the percentage of SBR. Furthermore, comparing the effect of SBR and X-SBR on bitumen emulsion uncovered that in equal polymer percentage of 6%, X-SBR promoted performance graded for at least one performance grade. Finally, the study is innovative as it dealt with the comparison of high-temperature performance analysis of the impact of polymer percentage simultaneous with that of SBR structure on improving bitumen emulsion.     

SBS改性乳化沥青生产新技术

简述改性乳化沥青的生产方法并介绍了一种生产SBS改性乳化沥青的新技术。