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題名 | "Comb" Shaped Copolymers from the Coupling of Living Polystyrene with Poly Vinyl Chloride and Poly β-Pinene Oxide=活性苯乙烯聚合體與聚氯乙烯或聚環氧松油精反應合成梳狀共聚合物之研究 |
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作者姓名(中文) | 薛敬和; 郭東富; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 9:2 1978.12[民67.12] |
頁次 | 頁111-117 |
關鍵詞 | 共聚合物; 松油精; 活性; 苯乙烯; 梳狀; 聚合體; 聚氯乙烯; 聚環氧; |
語文 | 英文(English) |
英文摘要 | Graft copolymers were synthesized by reacting anionic living polystyrene (PS) with (I) polyvinyl chloride, and (II) poly-β-pinene oxide under various conditions. It was found that the grafting efficiency and content of grafted PS were increased with the reaction time and the concentration of the backbone polymer, but reached a limiting value of 22.6% in the case of PVC and 57.1% in the case of poly-β-pinene oxide. An increase in degree of polymerization (DP) of the living polystyrene increased the content of grafted PS, by reduced the grafting efficiency. Living polystyrene prepared with n-BuLi gave better results as compared to those prepared with sodium naphthalene. The grafted polymers were identified by infrared absorbance and chemical tests. The rheological properties of the copolymers were studied with Rheovibron DDV- II, together with blended polymer samples. The glass transition temperature of the grafted copolymers were shifted to a higher temperature than those of blended polymers owing, probably, to the steric hindrance of the branched chains in grafted copolymers. |
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