PP／AS／DCP反应共混中SEBS的添加效应

研究了在聚丙烯（ＰＰ）／丙烯腈－苯乙烯共聚物（ＡＳ）／过氧化二异丙苯（ＤＣＰ）共混物反应挤出过程中添加热塑弹性体氢化（苯乙烯－丁二烯－苯乙烯共聚物）（ＳＥＢＳ）对ＰＰ／ＡＳ共混物降解的抑制效果对接枝反应的促进作用。对反应经物中ＰＰ相ＭＦＲ、红外测试及扫描电子显微镜与航向电子显微镜对共混物的观察结果表明,加入ＳＥＢＳ不但可以抑制反应共混中ＰＰ和ＡＳ的降解,而且可以大大促进反应共混中的接枝反应的进行,     

日本2000年新公布的JISK类标准目录(上)

1　新制定标准ＪＩＳＫ 6717-1　塑料　聚甲基丙烯酸甲酯模塑和挤塑材料　第 1部分 :系统命名和基本规格ＪＩＳＫ 6717-2　塑料　聚甲基丙烯酸甲酯模塑和挤塑材料　第 2部分 :试样制备和性能测定ＪＩＳＫ 6876-1　塑料　耐冲击性丙烯腈 /苯乙烯共聚物 (ＡＳＡ ,ＡＥＳ ,ＡＣＳ ,但ＡＢＣ除外 )模塑和挤塑材料　第 1部分 :系统命名和基本规格ＪＩＳＫ 6876-2　塑料　耐冲击性丙烯腈 /苯乙烯共聚物 (ＡＳＡ ,ＡＥＳ ,ＡＣＳ ,但ＡＢＣ除外 )　第 2部分 :试片的制备及性能测定ＪＩＳＫ 693 5 -2　塑料　氟高聚物分散体模塑和挤塑材料　第 2部分…     

HDPE/AS共混体系形态及力学性能

研究了相容剂ＬＤＰＦ－ｇ－ＡＳ对ＨＤＰＥ／ＡＳ共混体系形态及力学性能的影响。红外光谱研究表明采用固相接枝有效地形成了苯乙烯和丙烯腈与聚乙烯的 支共聚物,将其作为ＨＤＰＥ／ＡＳ共混体系的相容剂可大大减小分散相的粒子尺寸,显著提高共混体秒的力学性能,说明ＬＤＰＥ－ｇ－ＡＳ是该共混体系的有效相容剂。     

ASA共聚物：性能及应用

本文介绍了ＡＳＡ三元共聚物［丙烯酸酯－苯乙烯－丙烯腈］的结构、耐候性和耐热老化性。概述了ＡＳＡ树脂在汽车工业、电子电器工业等领域的应用。     

增容剂对HDPE／AS合金流变和力学性能的影响

研究了增容剂氯化聚乙烯接枝（丙烯腈／苯乙烯）共聚物对ＨＤＰＥ／ＡＳ共混体系加工流变性能和力学性能的影响。增容剂使共混体系的塑化时间减少,且随着增容剂用量的增加,共混体系的平衡扭矩和拉伸强度增大,而断裂伸长率在ＨＤＰＥ／ＡＳ／ＰＥ－Ｃ－ｇ－ＡＳ＝８０／２０／４时出现极大值;螺杆转速的增加使共混体系的平衡扭矩增大。     

氯化聚乙烯的应用

介绍了氯化聚乙烯（ＣＰＥ）作为高分子改性剂在改性聚氯乙烯（ＰＶＣ）、聚乙烯（ＰＥ）、丙烯腈－丁二烯－苯乙烯共聚物（ＡＢＳ）、乙烯－醋酸乙烯共聚物（ＥＶＡ）、ＰＥ／ＰＶＣ共混体系和橡胶等方面的应用情况。     

在SAN,HIPS装置上试生产PS树脂

在苯乙烯－丙烯腈共聚物和高抗冲聚苯乙烯装置上生产确定指标的本体聚苯乙烯树脂有一定的难度。从实践中总结探索出一套生产Ｂ－３、Ｂ－４、Ｂ－５型ＰＳ树脂的主要控制条件,其中Ｂ－５型ＰＳ树脂的性能和美国６８５Ｄ型ＰＳ树脂的性能相当。     

中国合成树脂及塑料文摘

每期文摘的题目均按汉语拼音顺序排列,英文按其字母顺序排列在汉字之前,数字开头的排在最前面。　　ＡＡＳ ＰＡ 6合金的相容性 宁方智（清华大学化学工程系） 高分子材料科学与工程,1999,15 （1）：111～ 113转 117。用反应挤出法制备了一系列的尼龙 6 苯乙烯 丙烯酸丁酯 丙烯腈共聚物（ＰＡ6 ＡＡＳ）合金的相容剂,采用透射电子显微镜（ＴＥＭ）观察了所得合金的微观形态,结合合金的力学性能,对所选用及所制备的相容剂进行了筛选。结果表明,以ＳＥＢＳ（苯乙烯 丙二烯三嵌段共聚物）与ＭＡＨ的接枝物作相容剂,或以ＳＥＢＳ的…     

利用规整接枝共聚物作为增容剂制备耐油热塑性弹性体

通过大单体技术合成了三种现整接校共聚物；主链为聚甲基丙烯酸及支链为甲基丙烯酸甲酯的接枝共聚物（ＰＭＡＡ－ｇ－ＰＭＭＡ）可用作氨醇橡胶与聚氯乙烯的熔融共混的增容剂，而主链为聚丙烯酰胺、支链为聚苯乙烯的接校共聚物（ＰＡＭ—ｇ－ＰＳ）及主链为聚甲基丙烯酸甲酯、支链为聚苯乙烯的接枝共聚物都能作为氯化聚乙烯与聚苯乙烯共混的增容剂。用量仅占２％即可制得耐油的热塑性共混物弹性体。     

单体配比对MMA-CHMI-St和MMA-CHMI-AN悬浮共聚物性能影响的研究

研究了甲基丙烯酸甲酯-N-环己基马来酰亚胺-苯乙烯和甲基丙烯酸甲酯-N-环己基马来酰亚胺-丙烯腈两种三元共聚体系中,单体用量对共聚物玻璃化温度和溶度参数的影响.结果表明,苯乙烯、丙烯腈的加入能提高N-环已基马来酰亚胺的反应活性.共聚物的玻璃化温度随着N-环己基马来酰亚胺用量的增加升高,随着苯乙烯用量的增加先升高后降低,而随着丙烯腈用量的增加降低.共聚物的溶度参数随着N-环己基马来酰亚胺用量的增加增大,而随着苯乙烯、丙烯腈用量的增加降低.     

Phase separation of some clear polyblends

By using variations of elution and precipitation techniques, a clear ABS resin is found to be a mixture of a styrene–butadiene rubbery copolymer, a methyl methacrylate–styrene–acrylonitrile copolymer, and a graft of the methyl methacrylate–styrene–acrylonitrile copolymer onto the styrene–butadiene rubber. A clear impact acrylic is separated into a methyl methacrylate–styrene–acrylonitrile copolymer and a methyl methacrylate–butadiene rubbery copolymer. Photomicrographs indicate that clarity in the clear ABS and impact acrylic is achieved by matching refractive indices of the continuous and dispersed polymer phases.     

丙烯腈含量对AS工程塑料性能的影响

以苯乙烯、丙烯腈为原料,在过氧化苯甲酰引发下本体反应合成AS工程塑料。考察了丙烯腈含量对其共聚物性能的影响。结果表明,随着丙烯腈含量的增加,共聚物的静态力学性能有相应提高;相对丙烯腈含量为15%而言,25%处冲击强度和弯曲强度的提高率分别为232.91%和32.31%。红外谱图表明,苯乙烯与丙烯腈之间发生了共聚反应。     

Influence of the ratio of styrene and acrylonitrile in crosslinked polymeric binders for use in high-temperature polymer concrete composites

The feasibility of using a monomer composition based on a styrene–acrylonitrile copolymer as a binder in high-strength and chemically resistant polymer concrete was demonstrated earlier. From this work it is clear that properties of the polymer concrete composite are dependent on the styrene/acrylonitrile ratio. This paper deals with the study of the effect of the styrene/acrylonitrile ratio in styrene–acrylonitrile–acrylamide–trimethylolpropane trimethacrylate monomer formulations on the thermomechanical properties of polymer concrete composites.     

板材级ABS树脂专用聚丁二烯胶乳的研究

通过小粒径胶乳合成工艺制备粒径100 nm左右的聚丁二烯胶乳(PBL),然后通过附聚得到部分较大粒径PBL,从而获得具有双峰粒径分布的附聚胶乳,附聚胶乳接枝后再与(苯乙烯/丙烯腈)共聚物掺混造粒制得(丙烯腈/丁二烯/苯乙烯)共聚物(ABS)。结果表明,用该附聚PBL制得的ABS树脂具有冲击强度高、熔体流动速率低和断裂伸长率高等特点,适于进行挤出成型,说明该附聚PBL适合制备板材级ABS树脂。     

Synthesis and properties of acrylonitrile-EPDM-4-chlorostyrene graft copolymer

Graft copolymerization of acrylonitrile (AN) and 4-chlorostyrene (4-Clst) onto ethylene–propylene–diene terpolymer (EPDM) was carried out using benzoyl peroxide as initiator. The effects of EPDM content, initiator concentration, solvent, mole ratio of 4-Clst to AN, reaction time, and reaction temperature on the graft copolymerization were examined. It was found that the light resistance, weatherability, and thermal stability of the acrylonitrile–EPDM–4-chlorostyrene graft copolymer were considerably better than those of acrylonitrile–butadiene–styrene copolymer.     

丙烯腈含量对苯乙烯-丙烯腈共聚物性能的影响

以苯乙烯、丙烯腈在添加质量分数为5%～15%的乙苯作稀释剂的条件下,进行热引发连续本体聚合,合成了无规苯乙烯-丙烯腈共聚物。研究了共聚物中丙烯腈含量对其物理性能的影响。结果表明,共聚物中丙烯腈含量增加,共聚物的密度、拉伸强度和弯曲强度均相应地提高,而冲击强度、维卡软化温度及硬度变化不明显。     

悬浮接枝共聚合成POE-g-MAS及其表征

用悬浮接枝法合成了乙烯-辛烯共聚物（POE）和甲基丙烯酸甲酯（MMA）-丙烯腈（AN）-苯乙烯（St）的接枝共聚物（POE-g-MAS）。研究了单体比率、POE／单体的比率、引发剂浓度和反应时间等因素对接枝共聚合反应的影响。从聚合产物中用丙酮抽提得到接枝共聚物POE-g-MAS,并用傅立叶变换红外光谱（FTIR）和差示扫描量热法（DSC）对POE-g-MAS进行了分析。实验证明MMA-AN-St已经接枝在POE分子链上。接枝链MAS在一定程度上影响了POE的结晶相,降低了POE的熔融温度和熔融热。     

苯乙烯-丙烯腈原子转移自由基聚合

采用四氯化碳为引发剂,三氯化铁与丁二酸复合物为催化剂,在N,N-二甲基甲酰胺溶剂中对苯乙烯、丙烯腈进行原子转移自由基共聚合。研究了苯乙烯和丙烯腈物质的量比、引发剂用量、反应时间、温度等工艺条件对共聚物收率的影响。得到最佳反应条件：原料配比n（苯乙烯）：n（丙烯腈）为3：1;引发剂用量为12．5mL,三氯化铁与丁二酸复合催发剂的量分别为0．2865g,0．1180g;反应温度为90％,反应时间48h。     

Complex formation of montmorillonite clay with polymers. Part 2: The use of montmorillonite clay–vinyl monomer complex as a comonomer in the copolymerization reaction of styrene–acrylonitrile monomers

The bulk copolymerization of styrene–acrylonitrile monomers using styrene‐N⁺–montmorillonite complex as a comonomer in the polymerization was studied. The X‐ray diffraction (XRD) analysis showed that part of the styrene‐N⁺–montmorillonite complex remained non‐dispersed (immiscible) and the copolymer was excluded from the interlayer of the immiscible part of the clay. The successive chemical extraction process revealed that a reasonable amount of the styrene–acrylonitrile copolymer was directly attached to the styrene‐N⁺–montmorillonite complex and enveloped the clay. Highly exfoliated clay lamella and nanospheres (3–5 nm) were observed by transmission electron microscopy (TEM). The montmorillonite clay assume two different morphologies, immiscible and exfoliated, on the basis of the XRD and TEM data. A simple method of calculation of the ratio of the exfoliated/immiscible amounts of the clay indicated that the amount of the styrene‐N⁺–montmorillonite complex exfoliated into separate lamella was 40 % (w/w) of the amount of the clay samples containing 2 % of the (styrene‐N⁺–montmorillonite complex) clay. This amount of exfoliated clay decreases with the increase of the concentration of the clay. The presence of the styrene‐N⁺–montmorillonite clay in the copolymerization reaction had a minor effect on both the copolymer composition and the molecular weight. Modification of the clay with the derivatized styrene monomer can achieve a nanocomposite using a percentage no more than 4 % (w/w) of complex in the copolymer. Copyright © 2004 Society of Chemical Industry     

Oxazoline‐containing compatibilizers for polyamide/SAN and polyamide/ABS blends

Polyamide (PA) and acrylonitrile/butadiene/styrene copolymer (ABS) may appear as a mixture in the recycled plastic stream. The incompatibility of these blends results in a blend with poor mechanical properties. The aim of this work is to partially convert the nitrile groups of the acrylonitrile/styrene copolymer (SAN) into oxazoline groups by reaction with aminoethanol (AE). Such modified SAN (SAN‐m) can react with the amine or carboxylic acid end groups of PA, and therefore used as compatibilizers for blends of PA with ABS. SAN‐m was found to reduce the SAN‐domain size in the PA/SAN‐blends. The initial acrylonitrile content of SAN‐m had a strong influence on the degree of conversion into oxazoline groups and on the compatibilizing effect. Mechanical properties of SAN‐m compatibilized PA/ABS blends were investigated. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 449–455, 2002