Polymerizable compound, liquid crystal composition comprising same and liquid crystal display device

A polymerizable compound, characterized in that the polymerizable compound is a compound represented by the following formula I:

• wherein
• L1 and L2 are each independently selected from H, C1-C5 alkyl or alkoxy, C2-C5 alkenyl or alkenoxy, fluorine-substituted C1-C5 alkyl or alkoxy, fluorine-substituted C2-C5 alkenyl or alkenoxy, and halogen, wherein any one or more non-adjacent —CH2— can be each independently replaced by —O—, —S—, —CO—, —CH2O—, —OCH2—, —COO—, —OOC—, or —Sp—;
• L3, L4, L5, and Le are each independently selected from H, C1-C5 alkyl or alkoxy, C2-C5 alkenyl or alkenoxy, fluorine-substituted C1-C5 alkyl or alkoxy, fluorine-substituted C2-C5 alkenyl or alkenoxy, and halogen;
• n1 and n2 each independently represent 0, 1, 2, 3, or 4;
• m1 and m2 each independently represent 0 or 1, and m1 and m2 are not both 0;
• each occurrence of P independently represents an acrylate group, a methacrylate group, or a fluoroacrylate group;
• Sp represents a single bond or a C1-C5 linear, branched or cyclic alkyl group, and the Sp groups are not both single bonds, wherein any one or more non-adjacent —CH2— can be replaced by —O—, —S—, —CO—, —CH2O—, —OCH2—, —COO—, —OOC—, or an acrylate group in such a manner that O- or S-atoms are not directly connected with each other, one or more H atoms can be independently replaced by F, Cl, or G3, and at least one H atom is replaced by G3;
• G3 represents a C1-C7 tertiary alcohol structure;
• and
• X represents —CH2—, —O—, or —S—.