无溶剂PVC—PU仿皮涂料的流变性能

指出不同的施工方法对无溶剂ＰＶＣ－ＰＵ涂料的流变性能有特殊的要求，并研究了剪切速率，树脂粒径、ＰＵ结构、增塑剂浓度和加工助剂等因素对体系粘度的影响。应用研究结果能制得符合用户要求的ＰＶＣ－ＰＵ涂料。     

橡胶配合加工技术讲座 第10讲 聚氨酯橡胶(PU)(续完)

（接上期）２２ＴＰＵ及其加工方法ＴＰＵ是一种不经过化学交联在室温下显示高弹性,在高温下失去高弹性变为粘流体并能按照热塑性塑料加工方式加工的ＰＵ。ＴＰＵ的制备原理与ＣＰＵ相同,差别仅在于原料组分的配比不同。根据结构特点分类,ＴＰＵ分为全热塑型和半热塑...     

论PU革基布

对ＰＵ革加工中使用的各种基布进行了论述，认为我国ＰＵ革基布行业的整体水平有待是一步提高。     

增强反应注射成型聚氨酯及其性能研究

以反应注射成型聚氨酯（ＲＩＭ－ＰＵ）为基体树脂，研制了以玻纤增强剂的增强反应注射成型聚氨酯（ＲＲＩＭ－ＰＵ）材料。讨论了原材料及玻纤对ＲＲＩＭ－ＰＵ加工工艺及材料性能的影响。结果表明，以碳化二亚胺改性的异氰酸酯（ＣＭ－ＭＤＩ）和低聚合异氰酸酯改性的异氰酸酯（ＰＡＰＩ）混合物与丙腈－－苯乙烯接枝改性环氧乙烷封端的聚醚二元醇（ＡＰＧ）为主要原料，玻纤长度不大于１．５时，不仅ＲＲＩＭ加工工艺性好，而且Ｒ     

组合聚醚PU—2,PU—3的开发及应用

介绍了两种新型的用于环保型电冰箱的组合聚醚ＰＵ－２、ＰＵ－３,其可用于制造绿色冰箱中的聚氨酯绝热保温材料。叙述了制造环保型电冰箱的组合聚醚的试制目的、原料组成、研制目标、技术路线、产品加工工艺、主要技术指标、泡沫主要物理性能及产品应用等情况。     

热塑性聚氨酯弹性体／氯化聚乙烯共混体系的研究

选用ＣＰＥ和ＣＰＥ／ＰＶＣ为改性剂．用双辊熔融共混的方式对ＴＰＵ的共混改性进行了系统的研究，对ＴＰＵ／ＣＰＥ和ＴＰＵ／ＣＰＥ／ＰＶＣ共混体系的性能进行了测试分析及对比。结果表明：选择适宜的ＴＰＵ种类和ＣＰＥ、ＣＰＥ／ＰＶＣ分别组成二元和三元共混体系，能明显改善ＴＰＵ的加工特性，并且基本保待了ＴＰＵ优良的耐油性和耐寒性。     

聚氨酯泡沫及其深加工产品复合面料的开发与应用

聚氨酯泡沫及其深加工产品复合面料的开发与应用邱洪根苏州吴县中联纺织材料厂（邮编２１５１０６）一、企业概况介绍：我厂是生产聚氨酯（ＰＵ）泡沫及其衍生产品的专业化生产单位，产品有ＰＵ泡沫和复合面料两大系列。８０年代中期在改革开放大潮的推动下，苏南地区涌现...     

无纺布基PU磨绒革的生产加工

对无纺布基ＰＵ磨绒革的生产加工工艺进行了论述。作者认为无纺布ＰＵ磨绒革具有广阔的发展前景。     

聚氨酯环氧树脂互穿网络的性能研究

本文以Ｎ，Ｎ－二甲基苄胺和二月桂酸二丁基锡为催化剂合成聚氨酯环氧树脂互穿网络弹性体，考察了产物的力学性能和热学性能。实验结果表明，ＩＰＮＰＵ／ＥＰ比纯ＰＵ具有更好的物理机枪豚加工性能，拉伸强度得到很大提高，并在ＥＰ含量为２０％时达到最大，而热稳定性有所降低。     

用FTIR研究聚氨酯／不饱和聚酯IPN体系的反应动力学

利用傅里叶变换红外光谱研究聚氨酯不饱和聚酯互穿聚合物网络体系的反应动力学，求出了ＰＵ的反应速度常数ｋ。实验结果表明，ＰＵ在半－ＩＰＮ体系中的反应为二级反应，ＩＰＮ体系中ＰＵ组分与ＵＰ组分的反应相互影响：ＵＰ组分使ＰＵ组分的前期反应速度变慢，后期反应速度相对增加；ＰＵ组分使ＵＰ组分聚合的诱导期明显缩短。ＰＵ和ＵＰ的配比对反应转化率的影响是反应前期ＰＵ组分含量越高，ＰＵ组分反应转化率也越高；反应后期，     

可循环再利用橡胶制品的制备研究

介绍以废旧轮胎或废旧橡胶制品的脱硫橡胶为主要原料、采用注射成型工艺制备可循环再利用橡胶制品的方法。废旧轮胎先经过去除钢丝、锦纶丝,粉碎、筛分预处理,再经过无污染的真空脱硫,混炼制成原料胶粒;无骨架材料的废旧橡胶制品直接经过真空脱硫处理也可以制成混炼胶颗粒;真空脱硫胶粒通过注射成型机和专门设计的模具,直接制成可以循环再利用的橡胶制品。     

基于双部分丢弃的模拟移动床产率提高策略

在保证产品纯度的情况下,提出一种带额外色谱柱的双部分丢弃策略以提高模拟移动床的产率。通过将工艺点选取在纯提取产品和非纯提余产品区域以增大进料流量,并将由此导致的含较多杂质的提余产品暂时丢弃。丢弃的提余产品作为循环进料通入到一个额外色谱柱中以进一步分离,部分不能达到指定纯度的额外产品被永久丢弃。在模拟移动床和额外色谱柱处分别收集到的产品组成总产品。分析了工艺点的选取、提余产品的积分纯度阈值和额外产品的积分纯度阈值对总产品性能参数的影响。研究结果表明,所提策略能够以较高的回收率利用原料,且能够显著提高分离过程的产率,其分离效果优于传统的模拟移动床工艺和部分丢弃策略。     

基于双部分丢弃的模拟移动床产率提高策略

在保证产品纯度的情况下,提出一种带额外色谱柱的双部分丢弃策略以提高模拟移动床的产率。通过将工艺点选取在纯提取产品和非纯提余产品区域以增大进料流量,并将由此导致的含较多杂质的提余产品暂时丢弃。丢弃的提余产品作为循环进料通入到一个额外色谱柱中以进一步分离,部分不能达到指定纯度的额外产品被永久丢弃。在模拟移动床和额外色谱柱处分别收集到的产品组成总产品。分析了工艺点的选取、提余产品的积分纯度阈值和额外产品的积分纯度阈值对总产品性能参数的影响。研究结果表明,所提策略能够以较高的回收率利用原料,且能够显著提高分离过程的产率,其分离效果优于传统的模拟移动床工艺和部分丢弃策略。     

卫浴产品的发展趋势

叙述了卫浴产品的市场现状．介绍了几种不同的卫浴产品的成分和性能，指出卫浴产品将会朝着多功能的趋势发展；     

Thermal oxidation of polypropylene close to industrial processing conditions

Thermal oxidation of isotactic polypropylene (PP) at 220 and 280°C in air was studied. Gas chromatography–mass spectrometric analysis was used to separate and identify the volatile products of PP oxidation. Twenty-three products were identified and 15 substances were quantified. The aldehydes are the principal products formed, followed by ketones, acids, and alcohols. The main organic product quantified was acetaldehyde. The volatile organic products formed constitute about 3% of the amount of water formed. The relative amounts of the most volatile products formed in the range 220–280°C are practically independent on the temperature of oxidation. The mechanism of formation on the oxidation products is discussed.     

Synthesis and Characterization of Poly (Acrylic Acid-co-Divinylbenzene) Microgels by Ultrasonic Degradation

The preparation of pure microgels in high yield was investigated by a new method which restricts the intermolecular crosslinking reaction between second-stage crosslinked products by steric hindrance of the first-stage crosslinked products. This is followed by ultrasonic degradation of the first-stage crosslinked products. The first-stage crosslinked products were prepared by copolymerization of styrene and divinylbenzene monomer in dioxane. with α,α′-azobisisobutyronitrile as initiator. The second-stage crosslinked products were prepared by copolymerization of acrylic acid and divinylbenzene monomer in first-stage crosslinked products highly swollen in dioxane, using α,α′-azobisisobutyronitrile as initiator. Degradation of first- and second-stage crosslinked products was carried out using an ultrasonic vibrator. The characteristics of the crosslinked products synthesized were investigated by gel permeation chromatography, dynamic laser light scattering and electron microscopy. It was found that the styrene-divinylbenzene gel of high molecular weight was scissioned preferentially with increasing ultrasonic degradation time and that ultrasonic degradation of compact and small size crosslinked products was very difficult. The crosslinked poly(acrylic acid)s are small compact microgels having a very narrow size distribution of 20-30 nm diameter. A pure microgel at nearly 100% conversion was obtained by the new preparation method suggested in this study.     

Co-pyrolysis as a method of upgrading some products of coal processing

Co-pyrolysis was investigated as a method of upgrading various products resulting from coal processing. Co-pyrolysis of vacuum residue (VR) with coal extraction products as well as with primary tars from flash pyrolysis leads to a considerably enhanced yield of liquid products. It has been established that superheated steam and increased outgassing rate, favour the yield of liquid products. The proportion of the ingredients in the mixture as well as the quality of the VR also have a definite effect. The excess yield of liquid products in co-pyrolysis of coal extraction products was 8–23 wt%, depending on operating conditions and the composition of the mixture. The flash co-pyrolysis of primary tars yielded a 1.5–15.9 wt% surplus of liquid products depending on the mixture composition. Products originating from co-pyrolysis of these raw materials with VR are characterized by relatively high atomic hydrogen to carbon ratio, usually not less than 1.5 and the total abscence of asphaltenes. Generally, co-pyrolysis of VR with various products of coal processing is comparable with hydrogenation in the light of good yields of liquid products.     

异噻唑啉酮衍生物凯松CG系列产品应用及前景

介绍异噻唑啉酮衍生物凯松系列及下游水处理剂产品在日化、药业、涂胶、水处理及其他工业领域应用的情况,并对高新生化助剂对我国绿色环保产业用途及推动意义进行了展望。     

电镀生产过程废次品数据信息获取与管理系统

废次品的产生具有不确定性。随着对电镀生产效能和电镀生产质量把控要求的提高,设计出一种电镀生产过程废次品数据信息获取与管理系统。该系统能够获取并存储电镀生产过程产生废次品的工序、废次品类型及废次品数量等数据信息。通过对数据信息进行分析,找出产生废次品的原因并进行针对性处理,实现提高电镀生产质量的目标。     

网售婴幼儿湿疹相关产品中激素类药物的检测及调查分析

采用超高效液相色谱-串联质谱(UHPLC-MS/MS)法,检测网络销售婴幼儿湿疹相关化妆品及消毒剂产品中激素类药物筛查(63种),结合样品信息对检测结果进行统计分析,调查产品中非法添加激素情况。结果表明,两种类型产品中均检出糖皮质激素,“妆”字号产品检出率为5.9%。通过调查分析发现婴幼儿湿疹类相关产品确实存在非法添加问题,且通过网络途径购买该类商品存在一定的局限性。