LLDPE—氢氧化镁复合材料性能研究

研究了偶联剂种类及用量与以线型低密度聚乙烯（ＬＬＤＰＥ）为基体的复合材料ＬＬＤＰＥ－Ｍｇ（ＣＨ）２的力学性能关系；同时考察了处理与未处理的氢氧化镁对复合体系力学性能及阻燃性能影响。结果表明，经表面处理的Ｍｇ（ＯＨ）２填充到ＬＬＤＰＥ中，其复合体系的分散性、力学性能、流动性均优于未处理的ＬＬＤＰＥ－Ｍｇ（ＯＨ）２复合体系，且关剂对Ｍｇ（ＯＨ）２的表面改性处理，主要改善了材料的力学性能，对阻燃性能影响     

红磷、聚磷酸铵增效Al（OH）_3／Mg（OH）_2阻燃HDPE的研究

通过测定氧指数和差热分析，研究了红磷、聚磷酸铵对于Ａｌ（ＯＨ）３和Ｍｇ（ＯＨ）２混合填充阻燃ＨＤＰＥ的增效作用．实验结果表明：虽然红磷、聚磷酸铵本身对ＨＤＰＥ的阻燃效果不佳，但它们都能增效Ａｌ（ＯＨ）３和Ｍｇ（ＯＨ）２阻燃ＨＤＰＥ，红磷的增效作用比聚磷酸铵更好．     

HDPE—g—MAH对填充体系增容作用的研究

研究了以聚乙烯／马亚酸酐接枝共聚物（ＨＤＰＥ－ｇ－ＭＡＨ）作为相容剂的ＨＤＰＥ／ＣａＣＯ３填充体系，通过对填充物的二甲苯萃取试验发现：接枝聚乙烯大分子链上的马来酸酐基团在熔融填充过程中与ＣａＣＯ３填料表面形成了一定的化学结合，改善了树脂与填料之间的界面亲和性，起到了增容作用。担伸与冲击性能测定表明增容填充体系的力学性能明显提高。     

中高压电力电缆用EPDM绝缘材料的开发

在１００份三元乙丙橡胶（ＥＰＤＭ）中加入ＺｎＯ５－８份，ＬＤＰＥ８－１０份，微晶石蜡４－７份，用硬脂酸锌片的煅烧陶土５０－６０份，Ａｌ（ＯＨ）３４０－５０份，硫化剂５－６份，防老剂１．２－１．６份，填料表面处理剂２－２．５份，制备了中高压电力电缆用ＥＰＤＭ绝缘材料。实验结果表明，成品电缆的物理机械性能可满足ＩＥＣ５０２－１９９４的要求。     

HDPE/EVA/LDPE共混物拉伸性能和流变性能研究

用ＥＶＡ、ＬＤＰＥ、ＣａＣＯ３改性,填充ＨＤＰＥ,研究了它们的用量,品种对共混珠拉伸性能和流变性能的影响。结果表明,共混物熔体为假塑性流体。ＥＶＡ、ＬＤＰＥ用量增加,共混物拉伸强度下降,但断裂伸长率和熔体流动性提高。     

刚性无机粒子改性HDPE的研究

本文根据非弹性体增韧改性的新观点，研究了几种刚性无机粒子（普通Ｃ２ＣＯ３、超细ＣａＣＯ３、钛白粉、超细石英粉）填充改性ＨＤＰＥ的效果以及填料粒子经不同的改性剂表面处理后填充的效果，并采用扫描电镜观察了试样的冲击断面形貌，探讨了刚性无机粒子增韧增强的机理及基本条件。结果表明，刚性无机粒子在基体有一定韧性且与基体结合紧密的条件下，可以促使周围基体发生屈服和取向，起到明显的增韧作用。     

稀土偶联剂（REC）对PP／Mg（OH）2体系性能的影响

研究了稀土偶联剂（ＲＥＣ）处理对ＰＰ／氢氧化镁（Ｍｇ（ＯＨ）２）体系的燃烧性能、流动性能、力学性能及老化性能的影响。未经处理的Ｍｇ（ＯＨ）２在填充量超过５０％时,ＰＰ／Ｍｇ（ＯＨ）２体系的ＯＩ≥２８．５,但这时冲击强度不足纯ＰＰ的３０％,熔体流动速率低于０．６ｇ／１０ｍｉｎ;而填料用２．５％（重量）ＲＥＣ处理后,填充量为５０％的体系冲击强度接近纯ＰＰ,ＭＦＲ达２．８ｇ／１０ｍｉｎ;ＲＥＣ对Ｍｇ（Ｏ     

刚性无机粒子改性HDPE

刚性无机粒子改性ＨＤＰＥ贾颖雷圣功吴其晔（山东家用电器配套厂，洛口２５００３２）（山东鲁斌电器有限公司）（青岛化工学院）本文根据刚性无机粒子增韧增强的理论观点，研究了几种刚性无机填料填充改性ＨＤＰＥ的效果，以及填料粒子经不同改性剂表面处理后填充的效果...     

聚乙烯固相接枝马来酸酐的研究

研究了以过氧化苯甲酰（ＢＰＯ）为引发剂,二甲苯为界面剂,粉状聚乙烯（ＨＤＰＥ、ＬＬＤＰＥ）固相接枝马来酸酐（ＭＡＨ）的反应。讨论了反应温度、引发剂用量、单体用量和界面剂种类等对接枝反应的影响,并用红外光谱法证实了接枝反应。结果表明,ＰＥ固相接枝ＭＡＨ反应对温度敏感,随温度升高,接枝率提高;在一定范围内,接枝率随引发剂用量、单体用量和搅拌转速、界面剂用量的增加而提高;界面剂用量虽少,但能促进ＢＰＯ、ＭＡＨ在ＰＥ上的反应。通过接枝反应可得到接枝率为９％左右的ＰＥ－ｇ－ＭＡＨ产物和接枝率为１３％以上的ＬＬＤＰＥ－ｇ－ＭＡＨ产物     

超临界CO_2从南海翡翠贻贝中萃取EPA和DHA的研究

用超临界ＣＯ２对南海翡翠贻贝中萃取二十碳五烯酸（ＥＰＡ）和二十二碳六烯酸（ＤＨＡ）工艺进行了研究,得出其最佳工艺条件为：压力３５ＭＰａ,温度３５℃,ＣＯ２用量２ｍｌ／ｇ料,尿素用量为乙酯量的１０％。乙酯的萃取率达到６１．５％。ＥＰＡ和ＤＨＡ乙酯总含量（ｗ）达到２８３２％。     

表面改性剂和硅油对HDPE/Al(OH)3力学性能的影响

探讨了各种表面改性剂和硅油对高填充HDPE/Al（OH)3复合材料力学性能的影响。研究表明,使用经特殊表面改性剂处理的Al（OH)3作填料并加入硅油时,可以大幅度提高HDPE/Al（OH)3复合材料的缺口冲击强度和断裂伸长率。利用扫描电镜和差示扫描量热仪研究了Al（OH)3的表面改性对硅油分布的影响,观察到硅油的两种分布类型;包覆Al(OH）3粒子和以液滴形式与Al(OH）3粒子单独分散于HDPE中,并将硅油的分布状况与材料的力学性能作了对比分析。     

Mechanical properties and microstructure of HDPE/AL(OH)3/silicone oil composite

The effect of surface modification on the mechanical properties and microstructure of the composites of high‐density polyethylene (HDPE), silicone oil, and aluminum hydroxide [Al(OH)₃] was investigated. The dispersion of silicone oil in the HDPE composites was studied by scanning electric microscope (SEM) and differential scanning calorimetry (DSC). In the HDPE/Al(OH)₃/silicone oil composites, two types of dispersion structure of silicone oil were observed resulting from different surface modifications. In the composites surface modified with titanate NDZ‐130, calcium stearate, or oleic acid, silicone oil encapsulates around Al(OH)₃ particles, and both the notched impact strength and the elongation at break are very high. However, in the composites surface modified with silane KH‐550 or silane‐g‐HDPE, silicone oil and Al(OH)₃ particles separately disperse in HDPE, and both the notched impact strength and the elongation at break are very low. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 1896–1903, 2002     

Deformation and fracture of Mg(OH)2‐filled polyolefin composites under tensile stress

The tensile behavior of high‐density polyethylene (HDPE), polypropylene (PP), and linear low‐density polyethylene composites containing a titanate coupling agent and silicone‐oil‐treated magnesium hydroxide [Mg(OH)₂] was studied. The increase in the extent of the ultimate elongation of the composites was affected by the yield stress and the strain‐hardening tendency of the polymer matrix in the composites. Ethylene–propylene–diene rubber and octane–ethylene copolymer were introduced to adjust the yield stress of PP and HDPE. Although the ultimate elongation of PP/elastomer and HDPE/elastomer blends was higher than that of virgin PP or HDPE, the ultimate elongation of the filled composites dropped at a high content of Mg(OH)₂. Scanning electron microscopy showed that the difference in the uniformity of the interface exfoliation decreased with the yield stress of the matrix. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3248–3255, 2003     

Effects of silicone oil and polymeric modifiers on the mechanical properties of highly filled LLDPE

The effects of coupling agents, silicone oil, and three types of polymeric modifiers on the mechanical properties of linear low density polyethylene (LLDPE) composites highly filled with aluminium hydroxide [Al(OH)₃] were studied. Polymeric modifiers that contain polar groups, such as silane‐grafted polyethylene (Si‐g‐PE) and acrylic‐acid‐grafted ethylene‐vinyl acetate copolymer (AA‐g‐EVA), improve the mechanical properties dramatically, while nonpolar modifiers improve them to some extent. When Al(OH)₃ was treated using a titanate coupling agent, the silicone oil increased the impact strength and elongation at break of the LLDPE/Al(OH)₃ composites. Introduction of a polymeric modifier containing polar groups destroys the beneficial effects of silicone oil on film mechanical properties, while the introduction of a nonpolar elastomeric polymeric modifier retains the high impact strength and elongation at break. SEM analyses provide the indirect evidence of the encapsulation of silicone oil around the filler. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 121–128, 2002     

羟基硅油对无卤阻燃HDPE的改性

用氧氧化镁(MH)和水合硼酸锌(ZB)无卤阻燃高密度聚乙烯(HDPE)。测试了试样的拉伸强度、弹陛摸量、断裂伸长率、氧指数、维卡软化点。针对无卤阻燃体系韧性下降很大的缺点．采用羟基硅油进行增韧。结果表明：1000份MH和10份ZB可使体系氧指数达到28.0%，但同时韧性大幅下降，加入6份羟基硅油可在一定程度上改善材料的韧性     

超微细Mg(OH)2复合阻燃改性PP-R的研究

研制了超微细Mg(OH)2和少量的十溴联苯醚复配阻燃剂与无规共聚聚丙烯(PP-R)的填充共混复合材料,研究了复配阻燃剂的用量和硅烷偶联剂对复合材料力学性能和阻燃性能的影响。结果表明,复配阻燃剂用量的增加对材料拉伸强度有较明显的影响,用量在10份左右时缺口冲击强度达到最大;用硅烷偶联剂处理的填料可改善复合材料的各项性能。复配阻燃剂显著提高了复合材料的阻燃性能,在用量为15份时,氧指数达到27％;用量超过20份,垂直燃烧性为FV-1级。微量发烟。     

羟基硅油对无卤阻燃HDPE改性研究

通过加入无卤阻燃剂使高密度聚乙烯达到阻燃抑烟的效果,测试了试样的拉伸强度、弹性模量、断裂伸长率、氧指数、维卡软化点,并进行了电镜分析。针对无卤阻燃体系韧性下降很大的缺点,采用羟基硅油进行改性。结果表明,羟基硅油可在一定程度上改善材料韧性,且能提高体系的氧指数,但同时使材料的拉伸强度和模量大幅下降。     

A comparative study of aging characteristics and thermal stability of oil palm ash,silica, and carbon black filled natural rubber vulcanizates

Filler‐filled natural rubber (NR) vulcanizates were prepared by conventional laboratory‐sized two roll mills and cured using sulfuric system. The effect of thermal aging on physical properties and thermogravimetric analysis (TGA) of oil palm ash (OPA) and commercial fillers (i.e., silica vulkasil C and carbon black N330)‐filled NR vulcanizates at respective optimum loading and equal loading were studied. Before aging, the OPA‐filled vulcanizates showed comparable optimum strength as carbon black‐filled vulcanizates. The hardening of aged filler‐filled NR vulcanizates happened after aging, thereby tensile strength and elongation at break reduced while the modulus increased. Fifty phr carbon black‐filled vulcanizates showed better retention in tensile properties as compared to silica (10 phr) and OPA (1 phr). This was attributed to the addition of different filler loading and this finding was further explained when equal loading of filler‐filled vulcanizates was studied. Fourier transform infra‐red analysis showed chemical structure had changed and tensile fractured surface exhibited smooth appearance due to the deterioration in tensile properties after aging. TGA also denoted the thermal stability was depending on the amount of filler loading. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4474–4481, 2013     

氧化铈对双组分室温硫化硅橡胶耐热性能的影响

以二月桂酸二丁基锡为促进剂、正硅酸乙酯为硫化剂、白炭黑和氧化铈为填料制备双组分室温硫化硅橡胶,研究了氧化铈用量对双组分室温硫化硅橡胶耐热性能的影响。结果表明,氧化铈能明显提高双组分室温硫化硅橡胶的耐热性能,且其用量为8份(质量,下同)时耐热效果较好。在250℃下经72 h热空气老化后,添加了8份氧化铈的双组分室温硫化硅橡胶拉伸强度和扯断伸长率的损失率都最小。添加6份氧化铈的双组分室温硫化硅橡胶的热分解温度较未添加者提高了25.5℃,氧化铈在400～510℃时抑制了硅橡胶的热失重行为。     

无卤阻燃EVA电缆专用料的配方优化

通过基体树脂复配、自制相容剂(E-g-M)增容以及E-g-M与三元乙丙橡胶(EPDM)并用等途径对乙烯-醋酸乙烯酯共聚物(EVA)/氢氧化镁(MH)/微胶囊化红磷(RP)无卤阻燃电缆料(EMP)性能进行了优化.结果表明:EVA与高密度聚乙烯(HDPE)复配可有效提高EMP电缆料的拉伸强度,EVA与HDPE的质量比为3:1时,EMP/HDPE电缆料的拉伸强度可由7.2 Mpa提高到9.7 Mpa;当在EMP/HDPE电缆料中添加12份E-g-M时,EMP/HDPE电缆料的拉伸强度由9.7 Mpa增至12.8 Mpa,冲击强度由26.5 kJ/m~2升至29.4 kJ/m~2,断裂伸长率由63.7%增至97.8%,E-g-M对EMP/HDPE电缆料起到了同时增强、增韧的作用;当EMP/HDPE/E-g-M电缆料中加入5份EPDM时,EMP/HDPE/E-g-M电缆料的韧性得到了进一步提高,冲击强度和断裂伸长率分别增至35.8 kJ/m~2和162.2%,并且两者的加入对EMP电缆料的拉伸性能、阻燃性能及加工性能影响较小.对照低烟无卤阻燃护套料的技术性能标准(YD/T 1113-2001),EMP/HDPE/E-g-M/EPDM电缆料的力学性能和阻燃性能均高于该标准.