高抗冲聚苯乙烯的研制

采用本体－悬浮法研究了高抗冲聚苯乙烯（ＨＩＰＳ）所用橡胶的结构及工艺条件对产品性能的影响。研究发现，随橡胶中乙烯结构含量的增加，ＨＩＰＳ橡胶接枝率增加；低顺胶ＨＩＰＳ橡胶相与ＰＳ相的相容性较差，高顺胶ＨＩＰＳ橡胶相与ＰＳ相的相容性好；从力学性能看，各交的ＨＩＰＳ拉伸性能相似，高顺胶的ＨＩＰＳ冲击性最好，低右线型胶次之，低顺星型胶较差。聚合过程中搅拌速度、橡胶用量及引发剂地ＨＩＰＳ的结构及性能也有一     

HIPS生产过程的“相转变”与产品性能

系统论述了ＨＩＰＳ（高抗冲聚苯乙烯）生产时相转变的过程，影响相转变的因素以及相转变对ＨＩＰＳ微观结构和产品性能的影响。     

用SBS或SBR或BR改进HIPS的冲击性能

采用机械共混法，在弹性体用量为５％￣２５％时，研究了ＳＢＳ，ＳＢＲ，ＢＲ分别对ＨＩＰＳ的增韧效果。ＳＢＳ可使ＨＩＰＳ的冲击韧性大幅度提高，并随ＳＢＳ含量增加显著上升。ＳＢＲ也能提高ＨＩＰＳ的冲击韧性，但幅度不大。ＢＲ的加入使ＨＩＰＳ的冲击韧性下降。前两者的冲击试样断面平整而光洁，有明显的应力发白现象，属韧性断裂，后者的断面粗糙不平，无应力发白现象，属脆性断裂。改性ＨＩＰＳ的形态随着弹性体的不同以及     

聚苯乙烯在线脱挥后与SBS橡胶生产特殊专用料

介绍了连继本体接枝共聚－－共混法制造ＨＩＰＳ特殊专用料的新工艺方法。讨论了ＳＢＳ橡胶加入量和共混温度等对聚合物材料的力学指标的影响。     

一种阻燃和冲击强度优异的HIPS成型料配方

在含特定聚丁二烯橡胶的ＨＩＰＳ树脂中，由于主要配合适量聚苯醚、金属螯合化合物、有机磷化合物、三嗪类化合物，结果这种配方的ＨＩＰＳ树脂成型料的阻燃性和冲击强度皆优。     

国内溶聚SBR和低顺式BR的市场及生产技术

国内溶聚ＳＢＲ和低顺式ＢＲ的市场及生产技术许秋华，刘同金，王凤菊，陈铃山，张红兵（齐鲁石油化工公司橡胶厂，淄博，２５５４３８）１市场前景高抗冲聚苯乙烯（ＨＩＰＳ）改性用低顺式聚丁二烯橡胶（ＬＣＢＲ）目前，我国聚苯乙烯（ＰＳ）生产能力达２１万ｔ／ａ，其...     

影响HIPS产品综合性能因素浅析

对连续本体工艺中影响ＨＩＰＳ性能的原辅材料，生产配方和工艺参数等进行了分析和讨论，提出了生产良好综合性能ＨＩＰＳ树脂的原辅材料选择原则，确定了配方，工艺参数的控制方案。     

巴斯夫推出冰箱衬里级的新型HIPS

巴斯夫推出冰箱衬里级的新型ＨＩＰＳ从１９９４年初起，高抗冲聚苯乙烯（ＨＩＰｓ）衬里必须与生产聚氨酯（ＰＵＲ）的冰箱保温层不用ＣＦＣ发泡剂的法规相适应。因目前所用之含氢发泡剂ＨＣＦＣ－１４１ｂ往往会导致传统的ＨＩＰＳ衬里开裂和爆皮。冰箱衬里级的ＨＩＰＳ...     

HIPS生产中影响落锤冲击的因素

介绍ＨＩＰＳ的生产工艺，分析影响ＨＩＰＳ落锤冲击的因素，提出最优配方。     

弹性体改性HIPS在电视机前壳上的应用

以弹性体ＳＢＳ为主对ＨＩＰＳ进行改性，实验结果表明：共混体系中一定含量的ＳＢＳ可提高ＨＩＰＳ的缺口冲击强度，使其接近ＡＢＳ水平。而对ＨＩＰＳ的其它力学性能、流动性能，热性能影响不大，可替代ＡＢＳ应用于ＴＶ前壳的注塑成型。     

高抗冲聚苯乙烯专用橡胶的研究进展

介绍了接枝聚合法生产高抗冲聚苯乙烯所使用的聚丁二烯橡胶及丁苯橡胶的研究进展，评述了橡胶的微观结构，相对分子质量及相对分子质量分布，支化度对高抗冲聚苯乙烯性能的影响，列举了高抗冲聚苯乙烯专用橡胶的牌号及性能指标。     

Isothermal crystallization, melting behavior and crystalline morphology of syndiotactic polystyrene blends with highly-impact polystyrene

Syndiotactic polystyrene (sPS) blends with highly-impact polystyrene (HIPS) were prepared with a twin-screw extruder. Isothermal crystallization, melting behavior and crystalline morphology of sPS in sPS/HIPS blends were investigated by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and polarized optical microscopy (POM). Experimental results indicated that the isothermal crystallization behavior of sPS in its blends not only depended on the melting temperature and crystallization temperature, but also on the HIPS content. Addition of HIPS restricted the crystallization of sPS melted at 320 °C. For sPS melted at 280 °C, addition of low HIPS content (10 wt% and 30 wt%) facilitated the crystallization of sPS and the formation of more content of α-crystal. However, addition of high HIPS content (50 wt% and 70 wt%) restricted the crystallization of sPS and facilitated the formation of β-crystal. More content of β-crystal was formed with increase of the melting and crystallization temperature. However, α-crystal could be obtained at low crystallization temperature for the specimens melted at high temperature. Addition of high HIPS content resulted in the formation of sPS spherulites with less perfection.     

聚苯乙烯生产工艺及其产品性能的改善

介绍了苯乙烯单体热引发本体聚合的特点及美国FINA石油化学公司聚苯乙烯生产工艺的特点，探讨了影响HIPS产品质量的多种因素，并对HIPS产品质量的改善提供提出建议和看法。     

Degradation of high‐impact polystyrene with processing and its recovery via the addition of styrene–butadiene rubber and styrene–ethylene–butylene–styrene block copolymer

This work was divided into three parts. First, high‐impact polystyrene (HIPS) was submitted to a series of extrusion cycles with the objective of evaluating the consequent variations in its thermal and mechanical properties. The results showed slight variations in both the thermal and mechanical properties of HIPS. Second, degraded HIPS/styrene–ethylene–butylene–styrene (SEBS) blends and degraded HIPS/styrene–butadiene rubber (SBR) blends were prepared to evaluate the influence of the elastomeric concentration on the polymer's properties. The incorporation of SEBS or SBR allowed the recovery of the initial properties shown by virgin HIPS. Finally, blends of degraded HIPS with 2 wt % SEBS or SBR were extruded through four cycles. The mechanical properties remained constant with 2% SEBS added, whereas the mixtures of HIPS with 2% SBR showed an increase in the tensile strength as the number of extrusion cycles increased. The Vicat softening temperature decreased in both cases. The use of differential scanning calorimetry permitted the observation of differences in the crosslinking reactions of different samples as a function of the number of extrusion cycles. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Influence of small rubber particles on the environmental stress cracking of high impact polystyrene

This article exploits the influence of rubber particle size (RPS) and rubber crosslinking on environmental stress cracking resistance (ESCR) of high impact polystyrene (HIPS), with special interest on the influence of small rubber particles fraction. Three commercial HIPS of high ESCR were selected and four batches of HIPS were prepared in‐house, including samples based on high cis and very high viscosity polybutadiene (PB). Their morphologies were analyzed by low angle laser light scattering, optical microscopy, and transmission electron microscopy, and the samples were submitted to flexural ESCR tests with fatty agents. The ESCR to sunflower oil was found to increase with the reduction of the rubber particles fraction smaller than 1–2 micron. Results have also confirmed that an increase in RPS is the key parameter to promote ESCR, although there is limit for RPS to be effective on ESCR improvement. The reduction of small rubber particles fraction in HIPS was achieved by using a high cis PB, that promotes low grafting efficiency of polystyrene onto PB backbone because of the low content of 1,2 vinyl isomer. Besides the ESCR improvements, HIPS with high cis PB showed higher elastic modulus and impact resistance than HIPS containing medium cis PB, which is desired for thickness reduction in food packaging and refrigeration cabinets. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

HIPS/纳米蒙脱土复合材料的研究

添加不同种类，不同数量的纳米蒙脱土，混炼制得HIPS／纳米蒙脱土复合材料，以改善高抗冲聚苯乙烯（HIPS）的性能，测试了其力学性能，热稳定性性。结果表明，添加3％烘干的蒙脱土Cloisite 30A的HIPS／纳米蒙脱土复合材料具有较好的综合力学性能，可作为工程塑料使用；HIPS／纳米蒙脱土复合材料的热稳定性与阻燃性有所改善，添加5％烘干的蒙脱土Cloisite 15A的HIPS／纳米蒙脱土复合材料具有较好的阻燃性。     

无卤阻燃高抗冲聚苯乙烯的研制

采用不同类型和不同用量的无卤阻燃剂与高抗冲聚苯乙烯熔融共混,制得无卤阻燃高抗冲聚苯乙烯。考察了阻燃剂的品种和用量对高抗冲聚苯乙烯阻燃性能的影响,介绍了各阻燃剂的基本阻燃机理,测试了无卤阻燃高抗冲聚苯乙烯的氧指数和燃烧热。结果表明,氰尿酸三聚氰胺盐复合阻燃剂对高抗冲聚苯乙烯有良好的阻燃效果。     

高抗冲聚苯乙烯的研制 Ⅲ.橡胶粒径分布及其对HIPS性能的影响

采用本体-悬浮法研究了高抗冲聚苯乙烯(HIPS)所用橡胶的结构及工艺条件对产品性能的影响。研究发现,随橡胶中乙烯结构含量的增加,HIPS橡胶接枝率增加;低顺胶HIPS橡胶相与PS相的相容性较差,高顺胶HIPS橡胶相与PS相的相容性好;从力学性能看,各种胶的HIPS拉伸性能相似,高顺胶的HIPS冲击性能最好,低顺线型胶次之,低顺星型胶较差。聚合过程中搅拌速度、橡胶用量及引发剂种类对HIPS的结构及性能也有一定影响。     

Effect of HIPS on polymorphism,melting, and crystallization behavior of sPS crystallized dynamically from melting state

Syndiotactic polystyrene/highly‐impact polystyrene (sPS/HIPS) blends were prepared with a twin‐screw extruder. Differential scanning calorimetry and wide angle X‐ray diffractometry were used to investigate the effect of the maximal melting temperature, the content of HIPS and cooling rates on the melting and crystallization behavior and crystal forms of sPS. The experimental results indicated that the addition of low content of HIPS induced the formation of more α‐crystal, whereas the addition of high content of HIPS favored the formation of β‐crystal for sPS/HIPS blends crystallized dynamically from low melting temperature. Both sPS and its blends produced only β‐crystal as crystallized from high melting temperature. The crystallization temperatures of sPS and its blends decreased as the melting temperature increased, favoring the formation of β‐crystal. Higher temperature of sPS crystallization favored the formation of more content of α‐crystal while lower temperature of sPS crystallization produced more content of β‐crystal. Cooling rates showed no significant effect on the crystal form of sPS and its blends, but influenced the melting behavior of both sPS and its bends. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3353–3361, 2007     

阻燃高抗冲聚苯乙烯的溶剂法再生工艺研究

采用天然无毒柠檬烯作为高抗冲聚苯乙烯的溶剂、以低毒正丙醇作为沉淀剂,考察了影响高抗冲聚苯乙烯树脂沉淀颗粒形态的各种因素,探讨了高抗冲聚苯乙烯溶液的浓度、沉淀温度、搅拌速度等因素对沉淀过程的影响规律。实验结果表明,当聚苯乙烯质量分数为15%、沉淀剂用量为3倍HIPS溶液的体积,在40℃及2 000 r/min的搅拌作用下,能获得沉淀颗粒大小合适的再生聚苯乙烯产品,聚苯乙烯的回收率达到97%(质量分数),原料中近90%多溴联苯醚可同时被去除。