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发明公开
CN104479318A 一种生物降解脂肪族-芳香族共聚酯组合物及其应用 有权

一种生物降解脂肪族-芳香族共聚酯组合物及其应用
摘要：
本发明公开了一种生物降解脂肪族-芳香族共聚酯组合物，按质量百分比计，包含以下组分：A：69.95%~89.95%含烷基/烷氧基侧链脂肪族-芳香族共聚酯；B：10%~30%聚乳酸；C：0.05%~3%相容剂；所述A按质量百分比计，包含以下组分：A1：44%~60%芳香族聚酯单元；A2：39%~55%直链脂肪族聚酯单元；A3：0.3%~3%含烷基/烷氧基侧链脂肪族二元酸酯单元；本发明的生物降解脂肪族-芳香族共聚酯组合物中由于加入特定配比的含烷基/烷氧基侧链脂肪族二元酸酯单元，使得制成的薄膜的屈服强度得到提高，有利于提高农用地膜耐受作物和杂草的穿刺性能，减小破孔现象出现的几率；且氧气透过率提高，水蒸气透过率降低，制成的薄膜用作农用地膜时具有更好的保温、保湿作用。
摘要（英）：

The invention discloses a biodegradable aliphatic-aromatic copolyester composition. The biodegradable aliphatic-aromatic copolyester composition contains the following ingredients in percentage by mass: A: 69.95-89.95% of alkyl/alkoxy side chain-containing aliphatic-aromatic copolyester, B: 10-30% of polylactic acid and C: 0.05-3% of compatibilizer, wherein the A contains the following ingredients in percentage by mass: A1: 44-60% of aromatic polyester unit, A2: 39-55% of straight-chain aliphatic polyester unit and A3: 0.3-3% of alkyl/alkoxy side chain-containing aliphatic dibasic acid ester unit. According to the biodegradable aliphatic-aromatic copolyester composition disclosed by the invention, the alkyl/alkoxy side chain-containing aliphatic dibasic acid ester unit of a specific proportioning ratio is added, so that the yield strength of manufactured films is improved, the improvement of crop and weed puncture resistance of agricultural mulching films is facilitated, and the probability of occurrence of a hole breaking phenomenon is reduced; the oxygen gas permeability is improved, and the water vapor permeability is lowered, so that the manufactured films have better heat preserving and moisture preserving effects as the agricultural mulching films.

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