防粘连塑料加工母料

<正> 由上海市开发成功的一种用于生产吹塑薄膜的FK防粘连滑爽母料现已投放市场。在生产吹塑薄膜特别是微薄的薄膜中,添加入这种防粘连母料,可在通用挤出吹塑设备上改善LDPE和LLDPE挤出吹塑时的加工性,提高制品的开口性,减少膜层之间或膜层     

兰光转换膜的研制及其水稻育秧效果试验

本文介绍了以LDPE与LLDPE为基料的农用兰光转换水稻育秧膜的研制与性能，以及该膜用于水稻育秧的应用效果试验。最终增产效果为5．5％。     

非淀粉型可控光、生物降解地膜研究与应用

采用ＬＤＰＥ、ＬＬＤＰＥ、ＨＤＰＥ等作为基础原料，并添加含有光敏剂、光氧稳定剂等组成的光降解体系和含有Ｎ．Ｐ．Ｋ等多种化学物质作为生物降解体系的浓缩母料，经挤出吹塑制成厚度０．００５ｍｍ的可控降解地膜。经５年６０余万亩农田应用考核，该降解地膜不仅具备普通地膜的保温、保墒和力学性能；而且它可控性好，诱导期稳定，在曝晒的条件下，当年可降解成粉末状。在无光照（如埋于土壤下）的条件下，也可观察到残膜表面上有微生物繁殖生长。     

含钐稀土离子转光农膜的制备及其性能研究

将含钐的稀土离子转光剂添加到聚乙烯树脂中,采用母料法制备转光膜,进行荧光分析及其它性能测试,结果表明:与普通薄膜相比,转光农膜能有效吸收264 nm范围的紫外光,在约650 nm处产生很强的红色荧光,并具有很好的光热稳定性;与聚乙烯薄膜具有良好的结合力,且不影响薄膜的加工工艺与物理性能;在薄膜加工中原有组分的光学性能基本保持不变.     

农用聚乙烯吹塑转光膜的开发与应用

简要论述了我国农业资源的现状和光能转换技术对我国农业发展的必要性,通过转光膜的性能测试和农田栽培试验表明农用聚乙烯吹塑转光膜能有效地改善农作物的光照条件,提高光能利用率,更好地提高温室效应和栽培效益,有益于农业作物的增产增收。     

助剂对聚乙烯防雾滴膜性能的影响

采用熔融共混法制备母料,然后将母料与基体树脂(聚乙烯)按一定比例混合,于吹塑机上吹塑成膜。研究了流滴缓释剂、减雾剂、防老剂及母料中防雾滴剂含量对薄膜防雾滴性能的影响。     

含饱和配位铕(Ⅲ)配合物转光膜的制备及其性能研究

将饱和配位铕(Ⅲ)配合物作为转光剂添加到低密度聚乙烯(LDPE)树脂中,采用母料法制备转光膜,并对其进行荧光分析及其他性能测试。结果表明:与普通薄膜相比,该转光膜能有效吸收紫外光,在623 nm产生很强的红色荧光,并具有良好的光热稳定性;转光剂与LDPE基体具有良好的相容性,其添加不影响薄膜的加工工艺及物理性能;在转光膜的加工过程中,薄膜原有组分的光学性能基本保持不变,但随着转光剂添加量的增加,转光膜的黄度指数逐渐增大。     

具有除草功能的薄膜用填充母料的研制

分别以低密度聚乙烯(PE–LD)(2012TN26)、PE–LD(1C7A)、乙烯–乙酸乙烯酯塑料(EVAC)、线性低密度聚乙烯(PE–LLD)、乙烯–辛烯共聚弹性体(POE)、PE回收料、PE–LLD粉料为载体树脂,以Ca CO3、滑石粉、新型矿物质填料N、凹凸棒土为母料核制备了薄膜用填充母料,用转矩流变仪分析了载体树脂和母料核对母料加工性能的影响,并将添加除草剂等制成的填充母料应用于吹塑薄膜生产。结果表明,以PE–LD(1C7A)作为载体,Ca CO3为母料核预制的填充母料的工艺性能较好;除草剂与填充剂一起加入制备母料的工艺可行;含除草剂的填充母料添加不超过10%时对薄膜的力学性能影响不大,并可赋予薄膜一定的除草功能。母料应用于塑料薄膜的加工不但可以降低成本,还赋予塑料薄膜优异的性能。     

青贮饲料膜母料

据“Modern Plastics International,1995,72(1):88”报道,比利时Cabot国际塑料公司新研究开发的青贮饲料膜用黑色母料,能有效防止热和紫外线辐射,并能提高薄膜直角撕裂强度。其牌号为Plasblak PE 2614,可用于挤出和共挤出吹塑膜和流延膜的生产。该专用母料PE中分散均匀,即使树脂中有高级增粘剂也能达到高的稀释质量,因此生产的薄膜表面平滑,有助于提高其     

国内外信息

LDPE/PA6共混阻透薄膜江苏石油化工学院研制成将LDPE(低密度聚乙烯 ) ,PA6 (尼龙 6 )和PE - g -MAH(马来酸酐接枝聚乙烯 )等混合后加入单螺杆挤出机内 ,经熔融挤出吹塑制成LDPE/PA6共混阻透薄膜 ,其阻透性能比纯LDPE膜提高了 10倍以上。PE吹塑转光膜徐州塑料一厂在PE中添加转光母料及转光粉制成PE吹塑转光膜。据介绍 ,转光膜在保持PE膜的外观质量和物理力学性能的同时 ,具有明显的增温效应 ,可促进农作物早熟 ,提高作物质量。(以上由常州市和平北路 9号　汪焕心供稿 )工程塑料低温抗冲改性剂据“AdditivesforPolymers” ,2 0…     

具有屏蔽蓝光性能的PVA基功能薄膜的制备及性能研究

依据颜色互补原理,以聚乙烯醇(PVA)为基材,黄颜料为蓝光吸收剂,制备具有屏蔽蓝光特性的PVA基功能薄膜。通过调控黄颜料的种类和含量,研究了不同种类的黄颜料对蓝光屏蔽性能和薄膜透光率的影响。研究发现,耐晒黄的蓝光屏蔽性能最佳,且当其含量为0.5%时,蓝光屏蔽性能达到饱和状态。     

1-甲氧基-9,10-二苯基蒽的制备及在农业上的应用

以蒽醌、溴苯等为主要起始原料,通过蒽的1位及9、10位取代,合成了1-甲氧基-9,10-二苯基蒽(MDPA)。改进和优化了各步合成工艺条件:在汞盐催化下,当反应温度为130℃,发烟硫酸浓度为20%~25%,反应时间为1.5 h时,中间体蒽醌-1-硫酸钾收率为53.7%;采用苯基锂与1-甲氧基蒽醌加成后,直接用SnC l2的乙酸水溶液还原,产品收率为68.9%。测试了MDPA在PE农膜中的转光性质。结果表明,将MDPA掺入PE树脂中而形成的蓝光膜能在波长438 nm处光致发光,该波长与植物光合作用所需的蓝光区相吻合;与普通农膜相比,蓝光膜可促进作物生长,使白菜、茼蒿、莴笋等蔬菜产量增加20%左右。     

On the Emitter of Blue Light in Copper‐Containing Pyrotechnic Flames

Thermodynamic modeling of eight copper‐containing pyrotechnic flames was carried out to investigate a suggestion that the emitter of blue light is Cu₃Cl₃. In seven of them the dominant Cu species was CuCl and in three, Cu₃Cl₃ was essentially absent (mole fraction <0.000005). This is consistent with previous spectroscopic studies showing that the blue light emitter is CuCl. The calculated adiabatic temperatures of flames from formulations reported to give good to excellent blue colors ranged from 1660 K to 2500 K. This is inconsistent with statements in the literature that the flame temperature has to be below 1500 K. An eighth formulation, specifically formulated to give a high temperature blue flame but reported to give a poor color, had a flame temperature of ~ 2900 K and the dominant Cu species was atomic Cu.     

高光高透CPP薄膜的制备及性能研究

采用物理共混法及多层流延工艺,通过高光高透专用母粒与聚丙烯(PP)共混,制备高光泽透明流延聚丙烯(CPP)薄膜,结合光电雾度仪、扫描电子显微镜(SEM)及偏光镜(POM)等技术,分析专用母粒对CPP薄膜综合性能的影响规律。结果表明,由于高光高透专用母粒的异相成核作用,一定程度地改善了CPP薄膜光学及力学性能;当专用母粒质量分数为20%时,雾度与光泽度较理想,分别为1.31%、145;同时,有利于改善CPP薄膜的微观结构及结晶晶体结构,具有明显的增强增韧作用。     

Blue Light Improves Photosynthetic Performance during Healing and Acclimatization of Grafted Watermelon Seedlings

To investigate the importance of light on healing and acclimatization, in the present study, grafted watermelon seedlings were exposed to darkness (D) or light, provided by blue (B), red (R), a mixture of R (68%) and B (RB), or white (W; 35% B, 49% intermediate spectra, 16% R) LEDs for 12 days. Survival ratio, root and shoot growth, soluble carbohydrate content, photosynthetic pigments content, and photosynthetic performance were evaluated. Seedling survival was not only strongly limited in D but the survived seedlings had an inferior shoot and root development, reduced chlorophyll content, and attenuated photosynthetic efficiency. RB-exposed seedlings had a less-developed root system. R-exposed seedlings showed leaf epinasty, and had the smallest leaf area, reduced chlorophyll content, and suppressed photosynthetic apparatus performance. The R-exposed seedlings contained the highest amount of soluble carbohydrate and together with D-exposed seedlings the lowest amount of chlorophyll in their scions. B-exposed seedlings showed the highest chlorophyll content and improved overall PSII photosynthetic functioning. W-exposed seedling had the largest leaf area, and closely resembled the photosynthetic properties of RB-exposed seedlings. We assume that, during healing of grafted seedlings monochromatic R light should be avoided. Instead, W and monochromatic B light may be willingly adopted due to their promoting effect on shoot, pigments content, and photosynthetic efficiency.     

聚乙烯转光棚膜的加工及应用研究

本文对聚乙烯转光棚膜的加工和光转换剂的作用、配比关系及物理性能进行了讨论。     

BC107抗菌粉体在PE流延打孔膜中的应用

先将BC107抗菌粉体制成BCM—E02A抗菌母料，再加入原材料混合均匀，然后经过流延成型、打孔制备出抗菌流延打孔膜。当BCM—E02A抗菌母料的用量为4％时，抗菌流延打孔膜具有高效广谱的抗菌性能，光老化性能优越．毒理试验符合要求。     

侧光光纤引导的内源可见光催化降解亚甲基蓝(英文)

The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a silicon cladding, which can emit light through side surface more uniformly and transmit light for longer distance to avoid attenuation of light by liquid medium. The filament lamp was chosen as visible light source. Different reaction conditions, such as the presence of optical fiber or not, the quantity of SOF, light irradiation intensity were tested by measuring the methylene blue degradation of methylene blue. The results show that suitable reaction conditions were 1.167 g·L-1 Ag + /TiO 2 with 7% (by mass) of Ag + doped in TiO 2 , and 500 roots of SOF (30 cm length in solution). The photocatalytic degradation efficiency under 300W lamp irradiation for 8h was about 97%. And the photocatalytic degradation efficiency of methylene blue degradation was proportional to SOF quantity, light irradiation intensity and catalytic dosage within a certain range. Compared with general UV and visible light SOFs could save a huge amount of energy and cost, in the potential applications in dealing with organic pollutants on a large scale.     

PE膜用填充母料的研制

以CaCO_3为填料核,低密度聚乙烯(LDPE)为载体制得填充母料并应用于聚乙烯(PE)膜中.研究了不同种类偶联剂活化CaCO_3、CaCO_3与LDPE共混比和PE蜡的加入对填充母料的熔体流动速率(MFR)的影响,考察了填充母料在PE膜中的应用效果.结果表明,DL-411-D型铝酸酯偶联剂的活化效果较好;CaCO_3与LDPE为2∶1～3∶1时母料的MFR适于薄膜的挤出流延;母料应用于PE膜中可达到作为卫生材料的要求.