Agricultural films are advance films that are a component of modern farming technologies used to increase farm productivity. These films are increasingly used in the market in APAC because of the growing population and the scarcity of arable land and food grains.

The history of tires dates back to the mid-1800s, during which only rubber tires, best known as solid tires, were used. Advances in technology led to the replacement of solid tires by pneumatic tires. They were first used in automobiles by the Michelin brothers, who went on to become one of the prominent tire vendors in Europe. Over time, the tire market witnessed new breakthroughs in technology and the entry of many vendors.

Membranes are a type of selective barrier primarily used for separation or concentration of the feed stream. The feed stream is passed through the membrane, which selectively allows some constituents to pass while others are retained back on the surface of the membrane depending on its pore size. The constituents that are allowed to pass are known as permeate and the ones retained back are known as concentrate or retentate. Different types of membranes are used in the pharmaceutical industry depending on their pore size. There are different types of membrane filtration technologies such as ultrafiltration, microfiltration, reverse osmosis, and nanofiltration. Other membrane technologies such as membrane contractors, electrodialysis, and pervaporation are also used but their market shares are smaller.

The idea of condoms and their usage is not new. They have been in existence for four centuries. Condoms are widely recommended and used for preventing pregnancy, STDs, and STIs. APAC is one of the fastest growing condom markets due to a need to control the population boom in many countries of the region. Efforts are being made by both commercial companies and governmental bodies for education in safe sex and promotion of the correct usage of condoms. This is the major reason for governmental distribution of free samples of condoms in some countries in Africa as well as in countries such as China, India, and Vietnam.

采用先酸化再空气氧化的方法对碳纳米管(CNTs)进行了纯化处理,并制备了2种环氧树脂(EP)/CNTs导热复合材料。研究了不同含量的CNTs及纯化CNTs对复合材料的导热性能、冲击性能及弯曲性能的影响。结果表明,纯化处理后,CNTs表面的催化剂粒子和无定形碳被去除,得到了纯净CNTs;当纯化CNTs含量为1.5%时(质量分数,下同),材料的冲击强度和弯曲强度最高,分别为24.95kJ/m2、127.2 MPa;当纯化CNTs含量为1.5%时,复合材料的热导率可达1.237 W/(m·℃)。

综述了芳香性聚酰亚胺(PI)在共混、共缩聚以及结构改性方面的研究进展,其中共聚改性按引入基团的不同又分为聚酰胺酰亚胺(PAI)、聚酯酰亚胺共聚物、引入含氮杂环等,结构改性包括在主链中引入杂元素、功能性侧基的引入、引入扭曲或非共平面结构,并提出PI在阻燃领域的发展方向。

以丙烯酸(AA)和丙烯酸丁酯(BA)为共聚单体,采用溶液接枝法对废聚苯乙烯(PS)进行接枝改性制得PS接枝共聚物,然后以PS接枝共聚物的乳液为基料制备改性PS防水涂料。研究了引发剂用量、单体用量、反应温度和反应时间对PS接枝共聚物接枝率的影响,以及填料和增塑剂的用量对改性PS防水涂料性能影响。结果表明,PS接枝共聚物的最佳合成工艺为:PS用量为30g,溶剂用量为60mL,引发剂用量为2.2g,单体用量为20g,反应温度为85℃,反应时间为2.5h;向改性PS乳液中填加10%的填料和4%的增塑剂制得的防水涂料性能最佳:耐水时间为25h,耐盐时间为27h,表干时间为18min,冲击强度达50kg·cm。

以三聚氯氰和苯基次膦酸二仲丁酯为原料合成了磷、氮协同阻燃剂2,4,6-三(O-仲丁基-苯基次膦酰基)-1,3,5-三嗪化合物,对各步反应进行了优化;用红外光谱、核磁等表征了产物的结构,并用极限氧指数方法测试了产物的阻燃性能等。结果表明,最佳反应条件为:三聚氯氰和苯基次膦酸二仲丁酯的摩尔比为1∶3.2,100℃持续反应5h,同时分馏出反应生成的2-氯丁烷,蒸馏出有机溶剂,重结晶得2,4,6-三(O-仲丁基-苯基次膦酰基)-1,3,5-三嗪,产率为89.4%;该产物阻燃聚对苯二甲酸丁二醇酯(PBT)以及该产物和三聚氰胺氰尿酸盐(MCA)、三聚氰胺聚磷酸盐(MPP)分别阻燃PBT的最高极限氧指数分别为21%、30%、26%,且融滴均较慢,成炭性均较好。

采用自制的甲基丙烯酸缩水甘油酯熔融接枝丙烯腈-丁二烯-苯乙烯三元聚合物[ABS-g-(GMA-co-St),AGS]为改性剂,对聚对苯二甲酸丁二醇酯(PBT)/聚碳酸酯(PC)(80/20)共混物进行改性研究。通过扫描电子显微镜、差示扫描量热仪、力学性能和流变性能测试研究了改性后共混物的性能。结果表明,随着AGS含量的增加,共混物中两相间的界面黏结增强;AGS对PBT/PC共混物具有强韧化的作用,与未添加AGS的PBT/PC共混物相比,当AGS含量为10份时,共混物的缺口冲击强度和拉伸强度分别提高了49.8%和17.4%;AGS的加入提高了共混物的界面强度和相容性;添加AGS能够提高共混物的结晶峰温度,起到促进晶粒生长的作用.

采用密炼机制备了聚苯乙烯/聚乳酸(PS/PLA)共混物,以超临界二氧化碳(CO2)为物理发泡剂,采用釜压法制备了PS/PLA共混物泡沫。采用差示扫描量热仪、偏光显微镜和扫描电子显微镜研究了PLA等温结晶行为、PS/PLA共混物的相态结构和PS/PLA共混物泡沫的泡孔结构。结果表明,反应型增容剂使PLA的等温结晶速率提高,晶体尺寸降低;增容剂能够促进PLA在PS中的分散;PLA的加入在发泡过程中能够起到异相成核作用,PLA的结晶有利于气泡的增长和稳定。