关键词：供需压力；塑料；格局

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10 月份，生产资料行业运行继续保持回暖态势。企业预期良好，效益改善。上游产品价格有所回落，生产增速继续保持稳中有升。市场需求继续趋好，业务活动较为活跃，商品周转效率有所提升，业务规模呈现趋稳回升发展态势。进入三季度以来，“稳增长、调结构”政策效果显现，经济活动链条上的采购、生产等各环节均出现明显积极变化，经济运行已进入平稳增长区间。

关键词：生产资料；石油；煤炭；钢材；有色金属；天然橡胶；汽车

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关键词：全球轮胎；产业链；原材料供应；变局；橡胶产业

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关键词：轮胎产量；环比增加

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关键词：乙丙橡胶；市场

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关键词：天然橡胶；市场；对外依存度

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Bioplastics are plastics that have been made from renewable biomass sources or food crops such as vegetable fat, corn starch, vegetable oil, pea starch, and microbiota. The different types of bioplastics available include polymers that are directly extracted from biomass and processed, polymers that are made from bio-based precursors such as PLA, and polymers that are made by bacteria such as PHA and PHB. Bioplastics are different from conventional plastics, and they can be used to produce various products such as utensils, bags, furniture, carpets, films, bottles, cups, and packaging materials. They are less harmful than other plastics, which are generally made from fossil fuels (such as petroleum), and they produce lower amounts of GHGs than other plastics. Consequently, the use of bioplastics helps in the reduction of carbon emissions, which is not possible with fossil fuel-based plastics. Bioplastics are widely used in the Packaging sector as they are eco-friendly in nature and reduce the risk of food contamination.

关键词：生物塑料；再生；生物质；粮食；聚合物；用于生产；各种产品；环保性质

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回顾了2013年1季度国内外合成橡胶价格走势，分析了价格变化的原因，对2013年2-3季度合成橡胶价格进行了预测。

关键词：国内外，合成橡胶，价格，走势，预测

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采用甲笨-2,4-二异氰酸酯(TDI)和环氧树脂(EP)混合制得的表面改性剂对Kevlar纤维进行表面接枝处理,利用扫描电子显微镜观察Kevlar纤维改性前后的表面形貌及改性Kevlar纤维与弹性体间剥离界面的破坏形貌,用衰减全反射傅里叶变换红外光谱仪分析Kevlar纤维改性前后表面化学基团的变化,研究了改性效果和机理.结果表明,TDI和EP发生了化学反应,改性剂可在Kevlar纤维表面引入活性基团,从而显著改善了Kevlar纤维与聚合物基体之间的界面粘合状态.

关键词：Kevlar纤维；改性；界面粘合；甲苯-2,4-二异氰酸酯；环氧树脂

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研究了阻燃聚丙烯(PP)分子量及其分布、不同黏度阻燃PP材料对塑化能力(塑化时间)影响；同时研究注塑过程中螺杆转速及背压变化对塑化时间的影响.结果表明,在PP材料的熔体流动速率接近时,阻燃PP重均分子量越高,分子量分布越窄,塑化时间越短；阻燃PP的黏度越高,塑化时间越短.注塑螺杆转速提高,塑化能力提高；增加注塑背压,不利于PP的塑化,不利于缩短塑化时间.

关键词：阻燃聚丙烯；塑化时间；分子量及其分布；螺杆速度；背压

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