丙烯酸改性氯化聚丙烯的合成和粘接性能的研究

氯化聚丙烯是聚丙烯的氯化改性产物，通过改性，其硬度、耐磨性、耐酸性、耐盐水性能比聚丙烯都好，耐热、耐老化性也优于聚丙烯。但其性能尤其是粘接性能还不能满足其在胶粘刺等方面的需要，为了进一步提高氯化聚丙烯的粘接性能，拓宽其应用领域，需对氯化聚丙烯改性。接枝共聚法是一种很好的化学改性方法。本文以丙烯酸(AA)作为接枝单体，以过氧化苯甲酰(BPO)为引发剂，以甲苯为溶刺，采用液相接枝共聚法，将丙烯酸单体接枝到氯化聚丙烯大分子链上，得到丙烯酸改性氯化聚丙烯产物。系统研究了反应温度、反应时间、引发剂过氧化苯甲酰用量和丙烯酸单体用量等因素对丙烯酸接枝改性的氯化聚丙烯产物粘接性能的影响，得出了较佳的工艺条件是反应温度T=100℃，反应时间t=3．5h，原料质量配比为100份氯化聚丙烯、3份丙烯酸和0．3份的过氧化二苯甲酰。研究还表明，丙烯酸改性的氯化聚丙烯的粘接性能优于氯化聚丙烯的粘接性能。

Study on synthesis and adhesiveness of modified chlorinated polypropylene with acrylic acid

Grafting of acrylic acid (AA) on chlorinated polypropylene (CPP) by free radical process was carried out at different temperatures and hours using toluene as solvent. The effect of temperature,time,initiator concentration and the ratio of chlorinated polypropylene and acrylic acid on the adhesiveness was studied. The optimum processing conditions were that the reaction temperature was 100 ℃, reaction time was 3.5 h,based on 100 parts chlorinated polypropylene 3 parts of acrylic acid and 0.30 parts benzoyl peroxide (BPO) were used. The adhesiveness of modified chlorinated polypropylene with acrylic acid was better than that of chlorinated polypropylene.